Anthracene derivative and organic electroluminescent element using the same

TECHNICAL FIELD

0001The invention relates to an anthracene derivative and an organic electroluminescence device using the same. In particular, the invention relates to an organic electroluminescence device having a prolonged lifetime and has a high luminous efficiency and an anthracene derivative which realizes the same.

BACKGROUND ART

0002An organic electroluminescence (EL) device is a promising solid-state emitting type inexpensive and large full-color display device, and has been extensively developed. In general, an organic EL device includes an emitting layer and a pair of opposing electrodes holding the emitting layer therebetween. When an electric field is applied between the both electrodes, electrons are injected from the cathode and holes are injected from the anode. The electrons recombine with the holes in the emitting layer to produce an excited state, and energy is emitted as light when the excited state returns to the ground state.

0003Conventional organic EL devices have a higher driving voltage than that of an inorganic light-emitting diode. The luminance or luminous efficiency thereof is also low, and their properties tend to deteriorate significantly. For these reasons, conventional organic EL devices have not been put in a practical use. Although recent organic EL devices have been improved gradually, further prolongation of lifetime, improvement in luminous efficiency or the like has been demanded.

0004The performance of an organic EL device has been gradually improved with improvements in emitting materials for an organic EL device. Improvement in luminous efficiency and prolongation of lifetime of an organic EL device is an important subject which leads to lowering in consumption power and improvement in durability of a display. Although luminous efficiency and lifetime of an organic EL device have been improved as a result of various studies, further improvement is demanded.

0005In order to solve these problems, Patent Documents 1 to 6 each disclose an organic EL device in which an anthracene derivative having dibenzofuran as a substituent is used as an emitting material. Although luminous efficiency is improved by using these materials, but the improvement was not sufficient. Further improvement in luminous efficiency and prolongation of lifetime has been required.

0006On the other hand, Patent Documents 4, 7 and 8 each disclose an emitting material having a fused dibenzofuran structure. However, an organic EL device using this emitting material has a defect that it has a poor efficiency and a significantly short life.

RELATED ART DOCUMENTS

Patent Documents

0000<ul id="ul0001" list-style="none"><li id="ul0001-0001" num="0007">Patent Document 1: JP-A-H11-111460</li><li id="ul0001-0002" num="0008">Patent Document 2: JP-A-2005-314239</li><li id="ul0001-0003" num="0009">Patent Document 3: JP-A-2007-63501</li><li id="ul0001-0004" num="0010">Patent Document 4: WO06/128800</li><li id="ul0001-0005" num="0011">Patent Document 5: WO05/113531</li><li id="ul0001-0006" num="0012">Patent Document 6: WO08/143,229</li><li id="ul0001-0007" num="0013">Patent Document 7: WO07/140,847</li><li id="ul0001-0008" num="0014">Patent Document 8: WO08/6449</li></ul>

SUMMARY OF THE INVENTION

0015An object of the invention is to obtain an emitting material capable of realizing an organic EL device which has a long life and a high luminous efficiency. <ul id="ul0002" list-style="none"><li id="ul0002-0001" num="0016">1. An anthracene derivative represented by the following formula (1):</li></ul>

0017<chemistry id="CHEM-US-00002" num="00002"><img file="US8629430B2_D0001.tif" /></chemistry><br /> wherein in the formula (1), of R₁to R₁₀is used for bonding to L₁, the one used for bonding to L₁is a single bond, R₁to R₁₀which are not used for bonding to L₁are independently a hydrogen atom, a halogen atom, a hydroxyl group, a cyano group, a substituted or unsubstituted amino group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 20 atoms that form a ring (hereinafter referred to as “ring carbon atoms”), a substituted or unsubstituted arylthio group having 6 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted heterocyclic group having 5 to 50 that form a ring (hereinafter referred to as “ring atoms”);

0018L₁is a single bond or a linkage group;

0019a, b and c are independently an integer of 1 to 4; and

0020Z is a structure represented by the following formula (2):

0021<chemistry id="CHEM-US-00003" num="00003"><img file="US8629430B2_D0002.tif" /></chemistry><br /> wherein in the formula (2), R₁₁to R₁₈are independently a hydrogen atom or a substituent and X₁is an oxygen atom or a sulfur atom; and

0022at least one pair of adjacent two substituents of R₁₁to R₁₈form a ring represented by the following formula (3) or (4):

0023<chemistry id="CHEM-US-00004" num="00004"><img file="US8629430B2_D0003.tif" /></chemistry><br /> wherein in the formulas (3) and (4), R₂₁to R₂₄and R₃₁to R₃₄are independently a hydrogen atom or a substituent and X₂is an oxygen atom or a sulfur atom;

0024any one of R₁₁to R₁₈which do not form a ring, R₂₁to R₂₄and R₃₁to R₃₄is used for bonding to L₁, and the ones used for bonding to L₁are a single bond. <ul id="ul0003" list-style="none"><li id="ul0003-0001" num="0025">2. The anthracene derivative according to 1, wherein Z is represented by any of the following formulas (5) to (7):</li></ul>

0026<chemistry id="CHEM-US-00005" num="00005"><img file="US8629430B2_D0004.tif" /></chemistry><br /> wherein in the formulas (5) to (7), R₁₀₁to R₁₁₀, R₁₁₁to R₁₂₀and R₁₂₁to R₁₃₀are independently a hydrogen atom or a substituent; any one of R₁₀₁to R₁₁₀, any one of R₁₁₁to R₁₂₀, and any one of R₁₂₁to R₁₃₀are used for bonding to L₁, the ones used for bonding to L₁are a single bond; and

0027X₁and X₂are independently an oxygen atom or a sulfur atom. <ul id="ul0004" list-style="none"><li id="ul0004-0001" num="0028">3. The anthracene derivative according to 1, wherein Z is represented by any of the following formulas (8) to (10):</li></ul>

0029<chemistry id="CHEM-US-00006" num="00006"><img file="US8629430B2_D0005.tif" /></chemistry><br /> wherein in the formulas (8) to (10), R₂₀₁to R₂₁₀, R₂₁₁to R₂₂₀and R₂₂₁to R₂₃₀are independently a hydrogen atom or a substituent; any one of R₂₀₁to R₂₁₀, any one of R₂₁₁to R₂₂₀and any one of R₂₂₁to R₂₃₀are used for bonding to L₁; and the ones used for bonding to L₁are a single bond; and

0030X₁is an oxygen atom or a sulfur atom. <ul id="ul0005" list-style="none"><li id="ul0005-0001" num="0031">4. The anthracene derivative according to any of 1 to 3, wherein b is 1 in the formula (1).</li><li id="ul0005-0002" num="0032">5. The anthracene derivative according to any of 1 to 4, wherein a is 1 or 2 in the formula (1).</li><li id="ul0005-0003" num="0033">6. The anthracene derivative according to any of 1 to 5, wherein L₁is bonded to R₅and/or R₁₀.</li><li id="ul0005-0004" num="0034">7. The anthracene derivative according to any of 1 to 5, wherein L₁is bonded to any of R₁to R₄.</li><li id="ul0005-0005" num="0035">8. The anthracene derivative according to 7, wherein L₁is bonded to R₂.</li><li id="ul0005-0006" num="0036">9. The anthracene derivative according to any of 6 to 8, wherein R₅is a group selected from a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms and a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.</li><li id="ul0005-0007" num="0037">10. The anthracene derivative according to 7 or 8, wherein R₅and/or R₁₀is a group selected from a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms and a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.</li><li id="ul0005-0008" num="0038">11. The anthracene derivative according to 9 or 10, wherein R₅has a structure represented by the following formula (11):</li></ul>

0039<chemistry id="CHEM-US-00007" num="00007"><img file="US8629430B2_D0006.tif" /></chemistry><br /> wherein in the formula (11), Ar₁is a group selected from a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms and a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms; Ra is independently a hydrogen atom or a substituent; and d is an integer of 1 to 4. <ul id="ul0006" list-style="none"><li id="ul0006-0001" num="0040">12. The anthracene derivative according to 9 or 10, wherein R₅is a substituted or unsubstituted fused aromatic ring having 10 to 30 ring carbon atoms.</li><li id="ul0006-0002" num="0041">13. The anthracene derivative according to any of 1 to 12, wherein X₁and X₂are oxygen atoms.</li><li id="ul0006-0003" num="0042">14. The anthracene derivative according to any of 1 to 13, which is a material for an organic electroluminescence device.</li><li id="ul0006-0004" num="0043">15. The anthracene derivative according to any of 1 to 14, which is an emitting material for an organic electroluminescence device.</li><li id="ul0006-0005" num="0044">16. An organic electroluminescence device which comprises between an anode and a cathode one or more organic thin film layers comprising an emitting layer, wherein at least one layer of the organic thin film layers comprises the anthracene derivative according to any of 1 to 15 singly or as a mixture component.</li><li id="ul0006-0006" num="0045">17. The organic electroluminescence device according to 16, wherein the emitting layer comprises the anthracene derivative.</li><li id="ul0006-0007" num="0046">18. The organic electroluminescence device according to 17, wherein the anthracene derivative is a host material.</li><li id="ul0006-0008" num="0047">19. The organic electroluminescence device according to 17 or 18, wherein the emitting layer further comprises a dopant material.</li><li id="ul0006-0009" num="0048">20. The organic electroluminescence device according to 19, wherein the dopant material is an arylamine compound.</li><li id="ul0006-0010" num="0049">21. The organic electroluminescence device according to 19, wherein the dopant material is a styrylamine compound.</li><li id="ul0006-0011" num="0050">22. The organic electroluminescence device according to 20, wherein the dopant material is a fused polycyclic amine derivative represented by the following formula (12):</li></ul>

0051<chemistry id="CHEM-US-00008" num="00008"><img file="US8629430B2_D0007.tif" /></chemistry><br /> wherein in the formula (12), Y is a substituted or unsubstituted fused aryl group having 10 to 50 ring carbon atoms; Ar₁₀₁and Ar₁₀₂are independently an aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms; and n is an integer of 1 to 4. <ul id="ul0007" list-style="none"><li id="ul0007-0001" num="0052">23. The organic electroluminescence device according to 22, wherein the dopant material is a fused polycyclic amine derivative which is represented by the following formula (13):</li></ul>

0053<chemistry id="CHEM-US-00009" num="00009"><img file="US8629430B2_D0008.tif" /></chemistry><br /> wherein in the formula (13), R_eis independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted aralkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted silyl group, a substituted or unsubstituted alkylgermanium group having 1 to 50 carbon atoms or a substituted or unsubstituted arylgermanium group having 6 to 50 ring carbon atoms; t is an integer of 1 to 10; and Ar₂₀₁to Ar₂₀₄are independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted heterocylic group having 5 to 50 ring atoms. <ul id="ul0008" list-style="none"><li id="ul0008-0001" num="0054">24. The organic electroluminescence device according to 22, wherein the dopant material is a fused polycyclic amine derivative which is represented by the following formula (14):</li></ul>

0055<chemistry id="CHEM-US-00010" num="00010"><img file="US8629430B2_D0009.tif" /></chemistry><br /> wherein in the formula (14), R_fis independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted aralkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted silyl group, a substituted or unsubstituted alkylgermanium group having 1 to 50 carbon atoms or a substituted or unsubstituted arylgermanium group having 6 to 50 ring carbon atoms; u is an integer of 1 to 8; and Ar₂₀₅to Ar₂₀₈are independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted heterocylic group having 5 to 50 ring atoms. <ul id="ul0009" list-style="none"><li id="ul0009-0001" num="0056">25. The organic electroluminescence device according to 22, wherein the dopant material is a fused polycyclic amine derivative which is represented by the following formula (15):</li></ul>

0057<chemistry id="CHEM-US-00011" num="00011"><img file="US8629430B2_D0010.tif" /></chemistry><br /> wherein in the formula (15), R_gis independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted aralkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted silyl group, a substituted or unsubstituted alkylgermanium group having 1 to 50 carbon atoms or a substituted or unsubstituted arylgermanium group having 6 to 50 ring carbon atoms; m is an integer of 1 to 10; and Ar₂₀₉to Ar₂₁₂are independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted heterocylic group having 5 to 50 ring atoms. <ul id="ul0010" list-style="none"><li id="ul0010-0001" num="0058">26. The organic electroluminescence device according to 22, wherein the dopant material is a fused polycyclic amine derivative represented by the following formula (16):</li></ul>

0059<chemistry id="CHEM-US-00012" num="00012"><img file="US8629430B2_D0011.tif" /></chemistry><br /> wherein in the formula (16), Ar₂₁₃to Ar₂₁₈are independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

0060By using the anthracene derivative of the invention, it is possible to provide an organic EL device which has a long life and a high luminous efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

0061<figref idref="DRAWINGS">FIG. 1</figref> is a schematic cross-sectional view of one embodiment of the organic EL device of the invention.

MODE FOR CARRYING OUT THE INVENTION

0062The anthracene derivative and the organic EL device of the invention will be explained in detail below.

0063The anthracene derivative of the invention is represented by the following formula (1):

0064<chemistry id="CHEM-US-00013" num="00013"><img file="US8629430B2_D0012.tif" /></chemistry>

0065In the formula (1), at least one of R₁to R₁₀is used for bonding to L₁, the one used for bonding to L₁is a single bond, R₁to R₁₀which are not used for bonding to L₁are independently a hydrogen atom, a halogen atom, a hydroxyl group, a cyano group, a substituted or unsubstituted amino group, a substituted or unsubstituted alkyl group having 1to 20 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 20 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

0066L₁is a single bond or a linkage group;

0067a, b and c are independently an integer of 1 to 4; and

0068Z is a structure represented by the following formula (2):

0069<chemistry id="CHEM-US-00014" num="00014"><img file="US8629430B2_D0013.tif" /></chemistry><br /> wherein in the formula (2), R₁₁to R₁₈are independently a hydrogen atom or a substituent and X₁is an oxygen atom or a sulfur atom; and

0070at least one pair of adjacent two substituents of R₁₁to R₁₈form a ring represented by the following formula (3) or (4):

0071<chemistry id="CHEM-US-00015" num="00015"><img file="US8629430B2_D0014.tif" /></chemistry>

0072R₂₁to R₂₄and R₃₁to R₃₄are independently a hydrogen atom or a substituent and X₂is an oxygen atom or a sulfur atom.

0073Any one of R₁₁to R₁₈which do not form a ring, R₂₁to R₂₄and R₃₁to R₃₄is used for bonding to L₁, and the one used for bonding to L₁is a single bond.

0074It is assumed that an organic EL device having a long life and a high luminous efficiency can be obtained due to the presence of an anthracene skeleton and a structure represented by Z.

0075R₁₁to R₁₈are preferably a hydrogen atom and an alkyl group, with a hydrogen atom being more preferable.

0076R₂₁to R₂₄and R₃₁to R₃₄are preferably a hydrogen atom, an alkyl group or the like, with a hydrogen atom being more preferable.

0077In the formula (2), if the substituents of R₁₅and R₁₆form the ring shown by the formula (4), it is preferred that R₁₅and R₁₆be hydrogen atoms. If R₁₅and R₁₆each have a substituent, size exclusion effects occur, and hence, the distance between adjacent molecules is increased in an amorphous thin film. As a result, the driving voltage increases. Therefore, it is preferred that R₁₅and R₁₆be a hydrogen atom.

0078In the formula (2), if the substituents of R₁₅and R₁₆form the ring shown by the formula (4), it is preferred that R₁₃and R₁₄be hydrogen atoms. If R₁₅and R₁₆each have a substituent, size exclusion effects occur, and hence, the distance between adjacent molecules is increased in an amorphous thin film. As a result, the driving voltage increases. Therefore, it is preferred that R₁₃and R₁₄be a hydrogen atom.

0079In the formula (2), if the substituents of R₁₃and R₁₄form the ring shown by the formula (4), it is preferred that R₁₅and R₁₆be hydrogen atoms. If R₁₃and R₁₄each have a substituent, size exclusion effects occur, and hence, the distance between adjacent molecules is increased in an amorphous thin film. As a result, the driving voltage increases. Therefore, it is preferred that R₁₅and R₁₆be a hydrogen atom.

0080As the divalent linkage group represented by L₁, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms can be mentioned.

0081Specific examples of the divalent heterocyclic group having 5 to 50 ring atoms include a group obtained by allowing the heterocyclic groups having 5 to 50 ring carbon atoms, which will be mentioned later, to be divalent.

0082Preferable heterocyclic groups represented by L₁include a pyridylene group, a pyrimidylene group, a dibenzofuranylene group and a carbazolylene group.

0083Specific examples of the divalent heterocyclic group having 5 to 50 ring atoms include a group obtained by allowing the heterocyclic groups having 5 to 50 ring carbon atoms, which will be mentioned later, to be divalent.

0084Preferable heterocyclic groups represented by L₁include a pyridylene group, a pyrimidylene group, a dibenzofuranylene group and a carbazolylene group.

0085As the linkage group having 3 or more valences represented by L₁, a group having 3 or more valences corresponding to the above-mentioned divalent linkage group represented by L₁can be mentioned.

0086L₁can be bonded to any one of R₁to R₁₀, preferably to any of R₁₀or R₁to R₄. It is more preferred that L₁be bonded to R₁₀or R₂.

0087Preferred examples of R₁to R₁₀include a hydrogen atom and an alkyl group. A hydrogen atom is more preferable.

0088It is preferred that R₅be a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

0089It is more preferred that R₅be a fused aryl group having 10 to 30 ring carbon atoms or a structure represented by the following formula (11):

0090<chemistry id="CHEM-US-00016" num="00016"><img file="US8629430B2_D0015.tif" /></chemistry><br /> wherein in the formula (11), Ar₁is a group selected from a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms and a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms.

0091Ra is independently a hydrogen atom or a substituent and d is an integer of 1 to 4.

0092Specific examples of the substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms and the substituted or unsubstituted heterocyclic group having 5to 30 ring atoms include an aryl group having 6 to 30 ring atoms and a heterocyclic group having 5 to 30 ring carbon atoms, mentioned later.

0093Ar₁is preferably a phenyl group, a naphthyl group, a phenanthryl group, a 9,9-dimethylfluorenyl group, a fluoranthenyl group, a biphenyl group, a terphenyl group, an anthryl group, a benzophenanthryl group, a chrysenyl group, a pyrenyl group, a triphenyl group, a benzochrysenyl group and a naphthacenyl group. A phenyl group, a naphthyl group, a phenanthryl group, a 9,9-dimethylfluorenyl group and a biphenyl group are particularly preferable.

0094Ra is preferably a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a cyano group, a silyl group, an aryl group and a heterocylic group, with a hydrogen atom, an aryl group and a heterocylic group being particularly preferable.

0095Specific examples of the fused aryl group having 10 to 30 ring carbon atoms represented by R₅are as mentioned later. A 1-naphthyl group, a 2-naphthyl group, a 1-anthryl group, a 2-anthryl group, a 9-anthryl group, a 1-phenanthryl group, a 2-phenanthryl group, a 3-phenanthryl group, a 4-phenanthryl group, a 9-phenanthryl group, a 1-naphthacenyl group, a 2-naphthacenyl group, a 9-naphthacenyl group, a 1-pyrenyl group, a 2-pyrenyl group, a 4-pyrenyl group, a 3-methyl-2-naphthyl group, a 4-methyl-1-naphthyl group and a 4-methyl-1-anthryl group or the like are further preferable.

0096For example, when L₁is bonded to R₂, it is preferred that R₅and R₁₀be a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms and that R₁, R₃, R₄, R₆to R₉be a hydrogen atom. In this case, an anthracene derivative is preferably any of the following anthracene derivatives (A-1) and (A-2).

0000(Anthracene Derivative (A-1))

0097Anthracene derivative (A-1) is one in which R₅and R₁₀are independently a substituted or unsubstituted fused aryl group having 10 to 50 ring carbon atoms or a substituted or unsubstituted fused heterocyclic group having 8 to 50 ring atoms. As the anthracene derivative, R₅and R₁₀may be the same substituted or unsubstituted fused ring group or may be different substituted or unsubstituted fused ring groups. Here, the fused ring group means a fused aryl group or a fused heterocyclic group.

0098Specific preferable examples of the fused aryl group or the fused heterocyclic group are as mentioned later. Of them, a naphthyl group, a phenanthryl group, a benzanthryl group, a 9,9-dimethylfluorenyl group and a dibenzofuranyl group are preferable.

0000(Anthracene Derivative (A-2))

0099Anthracene derivative (A-2) is one in which R₅and R₁₀are independently a substituted or unsubstituted non-fused aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted non-fused heterocyclic group having 5 to 50 ring atoms.

0100In a preferable mode, both R₅and R₁₀are substituted or unsubstituted phenyl groups. If R₅and R₁₀are substituted phenyl groups, the anthracene derivative (A-2) may have the structure represented by the above formula (11).

0101Specific examples of the preferable aryl group or the heterocyclic group as the substituent are as mentioned later. As the aryl group or the heterocyclic group as the substituent, a phenyl group, a biphenyl group, a naphthyl group, a phenanthryl group, a 9,9-dimethylfluorenyl group, a dibenzofuranyl group and a benzoanthryl group are further preferable.

0102In another preferable mode, the following anthracene derivatives (B) to (D) can be mentioned.

0000(Anthracene Derivative (B))

0103When L₁is bonded to R₁₀, it is preferred that R₅be a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms and that R₁to R₄and R₆to R₉be a hydrogen atom.

0000(Anthracene Derivative (C))

0104When L₁is bonded to R₁₀, it is preferred that R₂and R₅be a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms and that R₁, R₃, R₄, and R₆to R₉be a hydrogen atom.

0000(Anthracene Derivative (D))

0105When L₁is bonded to R₁₀and R₅, it is preferred that R₁, R₃, R₄, and R₆to R₉be a hydrogen atom. R₂is a hydrogen atom, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group. In this case, the structures of Z to be bonded to R₁₀and R₅may be the same or different. However, it is preferred that the structures be the same.

0106Z is preferably a structure represented by any of the following formulas (5) to (7):

0107<chemistry id="CHEM-US-00017" num="00017"><img file="US8629430B2_D0016.tif" /></chemistry>

0108In the formulas (5) to (7), R₁₀₁to R₁₁₀, R₁₁₁to R₁₂₀and R₁₂₁to R₁₃₀are independently a hydrogen atom or a substituent. Any one of R₁₀₁to R₁₁₀, any one of R₁₁₁to R₁₂₀and any one of R₁₂₁to R₁₃₀is used for bonding to with L₁. The one used for bonding to L₁is a single bond. X₁and X₂are independently an oxygen atom or a sulfur atom.

0109As preferable examples of R₁₀₁to R₁₁₀, any one of R₁₁₁to R₁₂₀and any one of R₁₂₁to R₁₃₀, a hydrogen atom, an alkyl group or the like can be mentioned, with a hydrogen atom being more preferable.

0110Further, it is preferred that Z be a structure represented by any of the following formulas (8) to (10):

0111<chemistry id="CHEM-US-00018" num="00018"><img file="US8629430B2_D0017.tif" /></chemistry>

0112In the formulas (8) to (10), R₂₀₁to R₂₁₀, R₂₁₁to R₂₂₀and R₂₂₁to R₂₃₀are independently a hydrogen atom or a substituent. Any one of R₂₀₁to R₂₁₀, any one of R₂₁₁to R₂₂₀and any one of R₂₂₁to R₂₃₀is used for bonding to L₁. A group used for bonding to L₁is a single bond. X₁is an oxygen atom or a sulfur atom.

0113R₂₀₁to R₂₁₀, R₂₁₁to R₂₂₀and R₂₂₁to R₂₃₉, in particular, R₂₂₉and R₂₃₀, are preferably a hydrogen atom from the viewpoint of attaining the advantageous effects of the invention easily.

0114It is preferred that X₁in the formulas (2) and (8) to (10) and X₁and X₂in the formulas (3) and (5) to (7) be an oxygen atom.

0115As the substituent of

0116R₁₁to R₁₈, R₂₁to R₂₄, R₃₁to R₃₄, R₁₀₁to R₁₁₀, R₁₁₁to R₁₂₀, R₁₂₁to R₁₃₀, R₂₀₁to R₂₁₀, R₂₁₁to R₂₂₀, R₂₂₁to R₂₃₀and Ra in the formulas (2) to (11), a halogen atom, a hydroxyl group, a cyano group, a substituted or unsubstituted amino group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 20 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms or the like can be mentioned.

0117a is preferably an integer of 1 or 2, more preferably an integer of 1. When a is an integer of 2 or more, plural structures of Z may be the same or different.

0118b is preferably 1. Therefore, L₁is preferably a divalent linkage group.

0119c is preferably an integer of 1 or 2, more preferably an integer of 1. When c is an integer of 2 or more, plural structures of [-L₁-(Z)_a] may be the same or different.

0120In the specification, the “carbons that form a ring” means carbon atoms that form a saturated ring, an unsaturated ring or an aromatic ring. The “atoms that form a ring” means carbon atoms or hetero atoms that form a hetero ring (including a saturated ring, an unsaturated ring and an aromatic ring).

0121Unless otherwise specified, as the substituent in the “substituted or unsubstituted . . . ”, a halogen atom, a cyano group, an alkyl group, a cycloalkyl group, a silyl group, an alkoxy group, an aryloxy group, an arylthio group, an aryl group, a heterocyclic group, a halogenated alkyl group, an aralkyl group or the like can be mentioned.

0122Further, the “unsubstituted” means that a hydrogen atom substitutes. In the invention, the hydrogen atom includes protium, deuterium and tritium.

0123The groups represented by R₁to R₈, R₁₁to R₁₇, R₂₁to R₂₇, R₃₁to R₃₇, R₄₁to R₄₈, Ra and Ar₁to Ar₄in the above formulas (1) to (4) and the substituents in the “substituted or unsubstituted . . . ” will be described below in detail.

0124As the halogen atom, fluorine, chlorine, bromine, iodine or the like can be mentioned, with fluorine being preferable.

0125As the substituted or unsubstituted amino group, an amino group substituted by an aryl group can be mentioned, and a phenylamino group is preferable. Specific examples of the aryl group which substitutes the amino group will be given later.

0126As the alkyl group having 1 to 20 (preferably 1 to 10, more preferably 1 to 8, and particularly preferably 1 to 4) carbon atoms, an ethyl group, a methyl group, an i-propyl group, an n-propyl group, an s-propyl group, an s-butyl group, a t-butyl group, a pentyl group, a hexyl group, a cyclopentyl group, a cyclopentyl group or the like can be given. Of these, a methyl group, an i-propyl group, a t-butyl group, a cyclohexyl group or the like can be mentioned.

0127As the cycloalkyl group, a cycloalkyl group having 3 to 20 (preferably 3 to 10, more preferably 3 to 8) ring carbon atoms can be mentioned. For example, a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group or the like can be given.

0128As the silyl group, an alkylsilyl group having 3 to 30 carbon atoms, an arylsilyl group having 8 to 30 ring carbon atoms or the like can be mentioned. For example, a trimethylsilyl group, a triethylsilyl group, a tert-butyldimethylsilyl group, a vinyldimethylsilyl group, a propyldimethylsilyl group, a triisopropylsilyl group, a triphenylsilyl group, a phenyldimethylsilyl group, a t-butyldiphenylsilyl group, a tritolylsilyl group, a trixylylsilyl group, a trinaphthylsilyl group or the like can be mentioned.

0129The alkoxy group having 1 to 20 (preferably 1 to 10, more preferably 1 to 8, and particularly preferably 1 to 4) carbon atoms is a group represented by —OY. As examples of Y, the same examples as those for the above-mentioned alkyl group can be given.

0130The aryloxy group having 6 to 20 (preferably 6 to 12) ring carbon atoms is a group represented by —OAr. Examples of Ar are the same as those for the aryl groups mentioned later.

0131The arylthio group having 6 to 20 (preferably 6 to 12) ring carbon atoms is a group represented by —SAr. Examples of Ar are the same as those for the aryl groups mentioned later.

0132As the specific examples of the aryl group having 6 to 50 (preferably 6 to 30, more preferably 6 to 20, and particularly preferably 6 to 12) ring carbon atoms, a phenyl group, a naphthyl group, a phenanthryl group, a biphenyl group, a terphenyl group, an anthryl group, a pyrenyl group, a chrysenyl group, a benzophenanthryl group, a benzanthranyl group, a benzochrysenyl group, a fluorenyl group, a fluoranthenyl group, a naphthacenyl group or the like can be given.

0133The “aryl group” in the specification means a hydrocarbon which is formed of an aromatic monocycle (non-fused aryl group) or a plurality of aromatic rings (fused aryl group).

0134The fused aryl group is a group, of the above-mentioned aryl groups, formed by fusing of two or more rings. The non-fused aryl group is a group other than the fused aryl groups of the above-mentioned aryl groups.

0135As the fused aryl group, a fused aryl group having 10 to 50 (preferably 10 to 30, more preferably 10 to 20) ring carbon atoms can be given. Of the specific examples of the above-mentioned aryl group, a naphthyl group, an anthryl group, a pyrenyl group, a phenanthryl group, a fluorenyl group, a fluoranthenyl group, a naphthacenyl group, a pyrenyl group or the like are preferable.

0136As the heterocyclic group having 5 to 50 (preferably 5 to 30, more preferably 5 to 20, particularly preferably 5 to 12) ring atoms, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a triazinyl group, an indolinyl group, a quinolynyl group, an acrydinyl group, a pyrrolidinyl group, a dioxanyl group, a piperidinyl group, a morphoryl group, a piperazinyl group, a triazinyl group, a carbazolyl group, a furanyl group, a thiophenyl group, an oxazolyl group, an oxadiazolyl group, a benzoxazolyl group, a thiazolyl group, a thiadiazolyl group, a benzothiazolyl group, a triazolyl group, an imidazolyl group, a benzimidazolyl group, a benzofuranyl group, a dibenzofuranyl group or the like can be given.

0137The fused heterocyclic group is a group, of the above-mentioned heterocyclic groups, which is formed by fusing of two or more rings.

0138As the fused heterocyclic group having 8 to 50 (preferably 8 to 30, more preferably 8 to 20) ring atoms, among the specific examples of the above-mentioned heterocyclic group, a dibenzofuranyl group, a pyridinyl group, a carbazolyl group, or the like can preferably be given.

0139As the halogenated alkyl group, for example, one obtained by substituting at least one hydrogen atom of the above-mentioned alkyl group with a halogen atom such as fluorine, chlorine, bromine and iodine can be given. Preferable examples are the same as those of the alkyl group.

0140The aralykyl group is represented by —Y—Z. As examples of Y, example of alkylene corresponding to the above-mentioned examples of the alkyl can be given, and as examples of Z, the above-mentioned examples of the aryl can be given. It is preferred that the aralkyl group be an aralkyl group having 7 to 50 carbon atoms (the aryl part has 6 to 49 (preferably 6 to 30, more preferably 6 to 20 and particularly preferably 6 to 12) carbon atoms, and the alkyl part has 1 to 44 (preferably 1 to 30, more preferably 1 to 20, further preferably 1 to 10 and particularly preferably 1 to 6) carbon atoms. For example, a benzyl group, a phenylethyl group and a 2-phenylpropane-2-yl group can be given.

0141Examples of the anthracene derivative represented by the formula (1) are given below, though not limited thereto.

0142<chemistry id="CHEM-US-00019" num="00019"><img file="US8629430B2_D0018.tif" /></chemistry><chemistry id="CHEM-US-00020" num="00020"><img file="US8629430B2_D0019.tif" /></chemistry><chemistry id="CHEM-US-00021" num="00021"><img file="US8629430B2_D0020.tif" /></chemistry><chemistry id="CHEM-US-00022" num="00022"><img file="US8629430B2_D0021.tif" /></chemistry><chemistry id="CHEM-US-00023" num="00023"><img file="US8629430B2_D0022.tif" /></chemistry><chemistry id="CHEM-US-00024" num="00024"><img file="US8629430B2_D0023.tif" /></chemistry><chemistry id="CHEM-US-00025" num="00025"><img file="US8629430B2_D0024.tif" /></chemistry><chemistry id="CHEM-US-00026" num="00026"><img file="US8629430B2_D0025.tif" /></chemistry><chemistry id="CHEM-US-00027" num="00027"><img file="US8629430B2_D0026.tif" /></chemistry><chemistry id="CHEM-US-00028" num="00028"><img file="US8629430B2_D0027.tif" /></chemistry><chemistry id="CHEM-US-00029" num="00029"><img file="US8629430B2_D0028.tif" /></chemistry><chemistry id="CHEM-US-00030" num="00030"><img file="US8629430B2_D0029.tif" /></chemistry><chemistry id="CHEM-US-00031" num="00031"><img file="US8629430B2_D0030.tif" /></chemistry><chemistry id="CHEM-US-00032" num="00032"><img file="US8629430B2_D0031.tif" /></chemistry><chemistry id="CHEM-US-00033" num="00033"><img file="US8629430B2_D0032.tif" /></chemistry><chemistry id="CHEM-US-00034" num="00034"><img file="US8629430B2_D0033.tif" /></chemistry><chemistry id="CHEM-US-00035" num="00035"><img file="US8629430B2_D0034.tif" /></chemistry><chemistry id="CHEM-US-00036" num="00036"><img file="US8629430B2_D0035.tif" /></chemistry><chemistry id="CHEM-US-00037" num="00037"><img file="US8629430B2_D0036.tif" /></chemistry><chemistry id="CHEM-US-00038" num="00038"><img file="US8629430B2_D0037.tif" /></chemistry><chemistry id="CHEM-US-00039" num="00039"><img file="US8629430B2_D0038.tif" /></chemistry><chemistry id="CHEM-US-00040" num="00040"><img file="US8629430B2_D0039.tif" /></chemistry><chemistry id="CHEM-US-00041" num="00041"><img file="US8629430B2_D0040.tif" /></chemistry><chemistry id="CHEM-US-00042" num="00042"><img file="US8629430B2_D0041.tif" /></chemistry><chemistry id="CHEM-US-00043" num="00043"><img file="US8629430B2_D0042.tif" /></chemistry><chemistry id="CHEM-US-00044" num="00044"><img file="US8629430B2_D0043.tif" /></chemistry><chemistry id="CHEM-US-00045" num="00045"><img file="US8629430B2_D0044.tif" /></chemistry><chemistry id="CHEM-US-00046" num="00046"><img file="US8629430B2_D0045.tif" /></chemistry><chemistry id="CHEM-US-00047" num="00047"><img file="US8629430B2_D0046.tif" /></chemistry><chemistry id="CHEM-US-00048" num="00048"><img file="US8629430B2_D0047.tif" /></chemistry><chemistry id="CHEM-US-00049" num="00049"><img file="US8629430B2_D0048.tif" /></chemistry><chemistry id="CHEM-US-00050" num="00050"><img file="US8629430B2_D0049.tif" /></chemistry><chemistry id="CHEM-US-00051" num="00051"><img file="US8629430B2_D0050.tif" /></chemistry><chemistry id="CHEM-US-00052" num="00052"><img file="US8629430B2_D0051.tif" /></chemistry><chemistry id="CHEM-US-00053" num="00053"><img file="US8629430B2_D0052.tif" /></chemistry><chemistry id="CHEM-US-00054" num="00054"><img file="US8629430B2_D0053.tif" /></chemistry><chemistry id="CHEM-US-00055" num="00055"><img file="US8629430B2_D0054.tif" /></chemistry><chemistry id="CHEM-US-00056" num="00056"><img file="US8629430B2_D0055.tif" /></chemistry><chemistry id="CHEM-US-00057" num="00057"><img file="US8629430B2_D0056.tif" /></chemistry><chemistry id="CHEM-US-00058" num="00058"><img file="US8629430B2_D0057.tif" /></chemistry><chemistry id="CHEM-US-00059" num="00059"><img file="US8629430B2_D0058.tif" /></chemistry><chemistry id="CHEM-US-00060" num="00060"><img file="US8629430B2_D0059.tif" /></chemistry><chemistry id="CHEM-US-00061" num="00061"><img file="US8629430B2_D0060.tif" /></chemistry><chemistry id="CHEM-US-00062" num="00062"><img file="US8629430B2_D0061.tif" /></chemistry><chemistry id="CHEM-US-00063" num="00063"><img file="US8629430B2_D0062.tif" /></chemistry><chemistry id="CHEM-US-00064" num="00064"><img file="US8629430B2_D0063.tif" /></chemistry><chemistry id="CHEM-US-00065" num="00065"><img file="US8629430B2_D0064.tif" /></chemistry><chemistry id="CHEM-US-00066" num="00066"><img file="US8629430B2_D0065.tif" /></chemistry><chemistry id="CHEM-US-00067" num="00067"><img file="US8629430B2_D0066.tif" /></chemistry><chemistry id="CHEM-US-00068" num="00068"><img file="US8629430B2_D0067.tif" /></chemistry><chemistry id="CHEM-US-00069" num="00069"><img file="US8629430B2_D0068.tif" /></chemistry><chemistry id="CHEM-US-00070" num="00070"><img file="US8629430B2_D0069.tif" /></chemistry><chemistry id="CHEM-US-00071" num="00071"><img file="US8629430B2_D0070.tif" /></chemistry><chemistry id="CHEM-US-00072" num="00072"><img file="US8629430B2_D0071.tif" /></chemistry><chemistry id="CHEM-US-00073" num="00073"><img file="US8629430B2_D0072.tif" /></chemistry><chemistry id="CHEM-US-00074" num="00074"><img file="US8629430B2_D0073.tif" /></chemistry><chemistry id="CHEM-US-00075" num="00075"><img file="US8629430B2_D0074.tif" /></chemistry><chemistry id="CHEM-US-00076" num="00076"><img file="US8629430B2_D0075.tif" /></chemistry><chemistry id="CHEM-US-00077" num="00077"><img file="US8629430B2_D0076.tif" /></chemistry>

0143The anthracene derivative represented by the above formula (1) can be used as a material for an organic EL device, in particular, as an emitting material for an organic EL device.

0144The organic electroluminescence device of the invention comprises between an anode and a cathode one or more organic thin film layers comprising an emitting layer, wherein at least one layer of the organic thin film layers comprises the anthracene derivative (1).

0145In the organic EL device of the invention, it is preferred that the emitting layer comprise the anthracene derivative (1).

0146It is preferred that the anthracene derivative (1) be a host material of the emitting layer.

0147In the invention, as the organic EL device in which the organic thin film layer is composed of plural layers, one in which an anode, a hole-injecting layer, an emitting layer and a cathode are sequentially stacked (anode/hole-injecting layer/emitting layer/cathode), one in which an anode, an emitting layer, an electron-injecting layer and a cathode are sequentially stacked (anode/emitting layer/electron-injecting layer/cathode), one in which an anode, a hole-injecting layer, an emitting layer, an electron-injecting layer and a cathode are sequentially stacked (anode/hole-injecting layer/emitting layer/electron-injecting layer/cathode), one in which an anode, a hole-injecting layer, a hole-transporting layer, an emitting layer, an electron-injecting layer and a cathode are sequentially stacked (anode/hole-injecting layer/hole-transporting layer/emitting layer/electron-injecting layer/cathode) or the like can be given.

0148In the organic EL device of the invention, although the anthracene derivative (1) may be used in any of the above-mentioned organic layers, it is preferred that it be contained in the emission zone. It is particularly preferred that it be contained in the emitting layer. The content thereof is usually 30 to 100 mol %.

0149By allowing the organic thin film layer to be composed of plural layers, the organic EL device can be prevented from lowering of luminance or lifetime due to quenching. If necessary, an emitting material, a doping material, a hole-injecting material or an electron-injecting material can be used in combination. Further, due to the use of a doping material, luminance or luminous efficiency may be improved. The hole-injecting layer, the emitting layer and the electron-injecting layer may respectively be formed of two or more layers. In such a case, in the hole-injecting layer, a layer which injects holes from an electrode is referred to as a hole-injecting layer, and a layer which receives holes from the hole-injecting layer and transports the holes to the emitting layer is referred to as a hole-transporting layer. Similarly, in the electron-injecting layer, a layer which injects electrons from an electrode is referred to as an electron-injecting layer and a layer which receives electrons from an electron-injecting layer and transports the electrons to the emitting layer is referred to as an electron-transporting layer. Each of these layers is selected and used according to each of the factors of a material, i.e. the energy level, heat resistance, adhesiveness to the organic layer or the metal electrode or the like.

0150Examples of the material other than those represented by the above-mentioned formula (1) which can be used in the emitting layer together with the anthracene derivative of the invention include, though not limited thereto, fused polycyclic aromatic compounds such as naphthalene, phenanthrene, rubrene, anthracene, tetracene, pyrene, perylene, chrysene, decacyclene, coronene, tetraphenylcyclopentadiene, pentaphenylcyclopentadiene, fluorene, and spirofluorene and derivatives thereof, organic metal complexes such as tris(8-quinolinolate)aluminum, triarylamine derivatives, styrylamine derivatives, stilbene derivatives, coumarin derivatives, pyrane derivatives, oxazone derivatives, benzothiazole derivatives, benzoxazole derivatives, benzimidazole derivatives, pyrazine derivatives, cinnamate derivatives, diketo-pyrrolo-pyrrole derivatives, acridone derivatives and quinacridone derivatives.

0151In the organic EL device of the invention, if desired, the emitting layer may contain an emitting dopant (phosphoric dopant and/or fluorescent dopant) in addition to the emitting material of the invention. Further, an emitting layer containing these dopants may be stacked on the emitting layer containing the compound of the invention.

0152A fluorescent dopant is a compound which can emit light from a single exciton. The fluorescent dopant is preferably a compound which is selected according to a required emission color from an amine-based compound, an aromatic compound, a chelate complex such as a tris(8-quinolinolate)aluminum complex, a coumarin derivative, a tetraphenylbutadiene derivative, a bisstyrylarylene derivative, an oxadiazole derivative or the like. A styrylamine compound, a styryldiamine compound, an arylamine compound and an aryldiamine compound are more preferable, with a fused polycyclic amine derivative being further preferable. These fluorescent dopants may be used either singly or in combination of two or more.

0153As the fused polycyclic amine derivative, one represented by the following formula (12) is preferable.

0154<chemistry id="CHEM-US-00078" num="00078"><img file="US8629430B2_D0077.tif" /></chemistry><br /> wherein in the formula (12), Y is a substituted or unsubstituted fused aryl group having 10 to 50 ring carbon atoms.

0155Ar₁₀₁and Ar₁₀₂are independently an aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms; and n is an integer of 1 to 4. n is preferably an integer of 1 to 2.

0156Specific examples of Y include the above-mentioned fused aryl group. Preferably, Y is a substituted or unsubstituted anthryl group, a substituted or unsubstituted pyrenyl group or a substituted or unsubstituted chrysenyl group.

0157It is preferred that the above formula (12) be one represented by the following formulas (13) to (16):

0158<chemistry id="CHEM-US-00079" num="00079"><img file="US8629430B2_D0078.tif" /></chemistry>

0159In the formulas (13) to (16), R_e, R_fand R_gare independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted aralkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted silyl group, a substituted or unsubstituted alkylgermanium group having 1 to 50 carbon atoms or a substituted or unsubstituted arylgermanium group having 6 to 50 ring carbon atoms.

0160Preferred examples of R_e, R_fand R_ginclude a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, with a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group or the like being more preferable.

0161t is an integer of 1 to 10. u is an integer of 1 to 8. m is an integer of 1 to 10.

0162Ar₂₀₁to Ar₂₁₈are independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.

0163Preferred examples of Ar₂₀₁to Ar₂₁₆include a substituted or unsubstituted phenyl group and a substituted or unsubstituted dibenzofuranyl group. Preferred examples of Ar₂₀₁to Ar₂₁₆include an alkyl group, a cyano group and a substituted or unsubstituted silyl group.

0164As examples of the alkyl group, the alkoxy group, the aryl group, the aryloxy group and the heterocyclic group in the formulas (12) to (16), the same examples as mentioned above as the examples of the heterocyclic group can be given.

0165As the alkynyl group having 2 to 50 (preferably 2 to 30, more preferably 2 to 20, and particularly preferably 2 to 10) carbon atoms, a vinyl group, an allyl group, a 1-butenyl group, a 2-butenyl group, a 3-butenyl group, a 1,3-butandienyl group, a 1-methylvinyl group, a styryl group, a 2,2-diphenylvinyl group, a 1,2-diphenylvinyl group, a 1-methylallyl group, a 1,1-dimethylallyl group, a 2-methylallyl group, a 1-phenylallyl group, a 2-phenylallyl group, a 3-phenylallyl group, a 3,3-diphenylallyl group, a 1,2-dimethylallyl group, a 1-phenyl-1-butenyl group, a 3-phenyl-1-butenyl group or the like can be given. A styryl group, a 2,2-diphenylvinyl group, a 1,2-diphenylvinyl group or the like are preferably given.

0166As the alkynyl group having 2 to 50 (preferably 2 to 30, more preferably 2 to 20 and particularly preferably 2 to 10) carbon atoms, a propargyl group, a 3-pentynyl group or the like can be given.

0167As the alkylgermanium group, a methylhydrogermyl group, a trimethylgermyl group, a triethylgermyl group, a tripropylgermyl group, a dimethyl-t-butylgermyl group or the like can be given.

0168As the arylgermanium group, a phenyldihydrogermyl group, a diphenylhydrogermyl group, a triphenylgermyl group, a tritolylgermyl group, a trinaphthylgermyl group or the like can be given.

0169As the styrylamine compound and the styryldiamine compound, those represented by the following formulas (17) and (18) are preferable.

0170<chemistry id="CHEM-US-00080" num="00080"><img file="US8629430B2_D0079.tif" /></chemistry>

0171In the formula (17), Ar₃₀₁is a k-valent group which corresponds to a phenyl group, a naphthyl group, a biphenyl group, a terphenyl group, a stilbene group, a styrylaryl group and a distyrylaryl group. Ar₃₀₂and Ar₃₀₃are independently an aryl group having 6 to 20 ring carbon atoms and Ar₃₀₁, Ar₃₀₂and Ar₃₀₃may be substituted.

0172k is an integer of 1 to 4. It is preferred that k be an integer of 1 to 2. Any one of Ar₃₀₁to Ar₃₀₃is a group having a styryl group. It is further preferred that at least one of Ar₃₀₂and Ar₃₀₃be substituted by a styryl group.

0173As the aryl group having 6 to 20 ring carbon atoms, specifically, the aryl groups as mentioned above can be given. Preferred examples include a phenyl group, a naphthyl group, an anthranyl group, a phenanthryl group and a terphenyl group.

0174In the formula (18), Ar₃₀₄to Ar₃₀₆is a v-valent substituted or unsubstituted aryl group having 6 to 40 ring carbon atoms. v is an integer of 1 to 4. It is preferred that v be an integer of 1 to 2.

0175Here, as the aryl group having 6 to 40 ring carbon atoms in the formula (18), specifically, the aryl groups as mentioned above can be given. Of these, a naphthyl group, an anthranyl group, a chrysenyl group, a pyrenyl group or an aryl group represented by the formula (20) are preferable.

0176As the preferable substituent which substitutes the above-mentioned aryl group, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an aryl group having 6 to 40 ring carbon atoms, an amino group which is substituted by an aryl group having 6 to 40 ring carbon atoms, an ester group having an aryl group having 5 to 40 ring carbon atoms, an ester group having an alkyl group having 1 to 6 carbon atoms, a cyano group, a nitro group, a halogen atom or the like can be given.

0177As the hole-injecting material, a compound which can transport holes, exhibits hole-injecting effects from the anode and excellent hole-injection effect for the emitting layer or the emitting material, and has an excellent capability of forming a thin film is preferable. Specific examples thereof include, though not limited thereto, phthalocyanine derivatives, naphthalocyanine derivatives, porphyline derivatives, benzidine-type triphenylamine, diamine-type triphenylamine, hexacyanohexaazatriphenylene, derivatives thereof, and polymer materials such as polyvinylcarbazole, polysilane and conductive polymers.

0178Of the hole-injecting materials usable in the organic EL device of the invention, further effective hole-injecting materials are phthalocyanine derivatives.

0179Examples of the phthalocyanine (Pc) derivative include, though not limited thereto, phthalocyanine derivatives such as H₂Pc, CuPc, CoPc, NiPc, ZnPc, PdPc, FePc, MnPc, ClAlPc, ClGaPc, ClInPc, ClSnPc, Cl₂SiPc, (HO)AlPc, (HO)GaPc, VOPc, TiOPc, MoOPc and GaPc-O—GaPc, and naphthalocyanine derivatives.

0180In addition, it is also possible to sensitize carriers by adding to the hole-injecting material an electron-accepting substance such as a TCNQ derivative.

0181Preferable hole-transporting materials usable in the organic EL device of the invention are aromatic tertiary amine derivatives.

0182Examples of the aromatic tertiary amine derivative include, though not limited thereto, N,N′-diphenyl-N,N′-dinaphthyl-1,1′-biphenyl-4,4′-diamine, N,N,N′,N′-tetrabiphenyl-1,1′-biphenyl-4,4′-diamine or an oligomer or a polymer having these aromatic tertiary amine skeletons.

0183As the electron-injecting material, a compound which can transport electrons, exhibits electron-injecting effects from the cathode and excellent electron-injection effect for the emitting layer or the emitting material, and has an excellent capability of forming a thin film is preferable.

0184In the organic EL device of the invention, further effective electron-injecting materials are a metal complex compound and a nitrogen-containing heterocyclic derivative.

0185Examples of the metal complex compound include, though not limited thereto, 8-hydroxyquinolinate lithium, bis(8-hydroxyquinolinate)zinc, tris(8-hydroxyquinolinate)aluminum, tris(8-hydroxyquinolinate)gallium, bis(10-hydroxybenzo[h]quinolinate)beryllium and bis(10-hydroxybenzo[h]quinolinate)zinc.

0186As examples of the nitrogen-containing heterocyclic derivative, oxazole, thiazole, oxadiazole, thiadiazole, triazole, pyridine, pyrimidine, triazine, phenanthroline, benzimidazole, imidazopyridine or the like are preferable, for example. Of these, a benzimidazole derivative, a phenanthroline derivative and an imidazopyridine derivative are preferable.

0187As a preferred mode, a dopant is further contained in these electron-injecting materials, and in order to facilitate receiving electrons from the cathode, it is further preferable to dope the vicinity of the cathode interface of the second organic layer with a dopant, the representative example of which is an alkali metal.

0188As the dopant, a donating metal, a donating metal compound and a donating metal complex can be given. These reducing dopants may be used singly or in combination of two or more.

0189In the organic EL device of the invention, the emitting layer may contain, in addition to at least one of the anthracene derivatives represented by the formula (1), at least one of an emitting material, a doping material, a hole-injecting material, a hole-transporting material and an electron-injecting material in the same layer. Moreover, for improving stability of the organic EL device obtained by the invention to temperature, humidity, atmosphere, etc. it is also possible to prepare a protective layer on the surface of the device, and it is also possible to protect the entire device by applying silicone oil, resin, etc.

0190As the conductive material used in the anode of the organic EL device of the invention, a conductive material having a work function of more than 4 eV is suitable. Carbon, aluminum, vanadium, iron, cobalt, nickel, tungsten, silver, gold, platinum, palladium or the like, alloys thereof, oxidized metals which are used in an ITO substrate and a NESA substrate such as tin oxide and indium oxide and organic conductive resins such as polythiophene and polypyrrole are used. As the conductive material used in the cathode, a conductive material having a work function of smaller than 4 eV is suitable. Magnesium, calcium, tin, lead, titanium, yttrium, lithium, ruthenium, manganese, aluminum, and lithium fluoride or the like, and alloys thereof are used, but not limited thereto. Representative examples of the alloys include, though not limited thereto, magnesium/silver alloys, magnesium/indium alloys and lithium/aluminum alloys. The amount ratio of the alloy is controlled by the temperature of the deposition source, atmosphere, vacuum degree or the like, and an appropriate ratio is selected. If necessary, the anode and the cathode each may be composed of two or more layers.

0191In the organic EL device of the invention, in order to allow it to emit light efficiently, it is preferred that at least one of the surfaces be fully transparent in the emission wavelength region of the device. In addition, it is preferred that the substrate also be transparent. The transparent electrode is set such that predetermined transparency can be ensured by a method such as deposition or sputtering by using the above-mentioned conductive materials. It is preferred that the electrode on the emitting surface have a light transmittance of 10% or more. Although no specific restrictions are imposed on the substrate as long as it has mechanical and thermal strength and transparency, a glass substrate and a transparent resin film can be given.

0192Each layer of the organic EL device of the invention can be formed by a dry film-forming method such as vacuum vapor deposition, sputtering, plasma ion plating, ion plating or the like or a wet film-forming method such as spin coating, dipping, flow coating or the like. Although the film thickness is not particularly limited, it is required to adjust the film thickness to an appropriate value. If the film thickness is too large, a large voltage is required to be applied in order to obtain a certain optical output, which results in a poor efficiency. If the film thickness is too small, pinholes or the like are generated, and a sufficient luminance cannot be obtained even if an electrical field is applied. The suitable film thickness is normally 5 nm to 10 μm, with a range of 10 nm to 0.2 μm being further preferable.

0193In the case of the wet film-forming method, a thin film is formed by dissolving or dispersing materials forming each layer in an appropriate solvent such as ethanol, chloroform, tetrahydrofuran and dioxane. Any of the above-mentioned solvents can be used.

0194As the solvent suited to such a wet film-forming method, a solution containing the aromatic amine derivative of the invention as an organic EL material and a solvent can be used.

0195It is preferred that the organic EL material contain a host material and a dopant material, that the dopant material be the aromatic amine derivative of the invention, and that the host material be at least one selected from the compounds represented by the formula (5).

0196In each organic thin film layer, an appropriate resin or additive may be used in order to improve film-forming properties, to prevent generation of pinholes in the film, or for other purposes.

0197The organic EL device of the invention can be suitably used as a planar emitting body such as a flat panel display of a wall-hanging television, backlight of a copier, a printer or a liquid crystal display, light sources for instruments, a display panel, a navigation light, or the like. The compound of the invention can be used not only in an organic EL device but also in the field of an electrophotographic photoreceptor, a photoelectric converting element, a solar cell and an image sensor.

EXAMPLES

Production Example

(A) Synthesis of Intermediate (A)

0198<chemistry id="CHEM-US-00081" num="00081"><img file="US8629430B2_D0080.tif" /></chemistry>

(A-1) Synthesis of 1-bromo-2,6-dimethoxybenzene

0199In the atmosphere of argon, 19.3 g of 1,3-dimethoxybenzene and 500 mL of anhydrous diethyl ether were placed in a flask. 105 mL (1.6M) of a hexane solution of n-butyllithium was added, and the resulting reaction solution was stirred with heating for 4 hours. After cooling to room temperature while stirring, the reaction solution was cooled to −50° C., followed by dropwise addition of 25 g of bromine. Then, while heating the reaction solution to room temperature, stirring was conducted for 2 hours. Then, 300 mL of an aqueous 10% sodium thiosulfate solution was added, and the resulting mixture was stirred for 1 hour. The reaction solution was extracted with ether, and an aqueous phase was removed, and then, an organic phase was washed with saturated saline. The organic phase was dried with magnesium sulfate and concentrated. Residues were purified by means of silica gel column chromatography. The resulting crystals were washed with hexane, whereby 17.9 g (yield: 52%) of white crystals of 1-bromo-2,6-dimethoxybenzene were obtained.

(A-2) Synthesis of 1,3-dibromo-2,6-dimethoxybenzene

020017.9 g of 1-bromo-2,6-dimethoxybenzene and 200 mL of acetonitrile were placed in a flask, and the resulting mixture was cooled on ice. Then, 14.7 g of N-bromosuccinimide was added. Then, while heating the reaction solution to room temperature, stirring was conducted for 8 hours. 2.39 g of N-bromosuccinimide was further added, and stirring was conducted at room temperature for 7 hours. After completion of the stirring, the solvent was distilled off under reduced pressure. Residues were dissolved in dichloromethane, and washed sequentially with sodium thiosulfate and saturated saline. An organic phase was dried with magnesium sulfate and concentrated. Residues were purified by means of silica gel column chromatography, whereby 23.2 g (yield: 95%) of colorless oil of 1,3-bromo-2,6-dimethoxybenzene was obtained.

(A-3) Synthesis of 2,4-bis(2-fluorophenyl)-1,3-dimethoxybenzene

0201In the atmosphere of argon, 23.2 g of 1,3-dibromo-2,6-dimethoxybenzene, 32.9 g of 2-fluorophenylboronic acid, 5.43 g of tetrakis(triphenylphosphine)palladium(0), 150 mL of toluene, 150 mL of 1,2-dimethoxyethane and 150 mL of a 2M aqueous sodium carbonate solution were placed in a flask. The resulting mixture was stirred with heating under reflux for 24 hours. After being cooled to room temperature, an aqueous phase was removed, and an organic phase was washed with saturated saline. The organic phase was dried with magnesium sulfate and concentrated. Residues were purified by means of silica gel column chromatography. The resulting crystals were recrystallized from hexane, whereby 11.6 g (yield: 45%) of white crystals of 2,4-bis(2-fluorophenyl)-1,3-dimethoxybenzene were obtained.

(A-4) Synthesis of 1-bromo-3,5-bis(2-fluorophenyl)-2,4-dimethoxybenzene

020211.6 g of 2,4-bis(2-fluorophenyl)-1,3-dimethoxybenzene and 480 mL of N,N-dimethylformamide were placed in a flask. 20 mL of a N,N-dimethylformaminde solution of 6.31 g of N-bromosuccinimide was added. The reaction solution was stirred at 40° C. for 5 hours. 2.20 g of N-bromosuccinimide was further added, and the resulting mixture was stirred at 50° C. for 8 hours. After cooling to room temperature, 300 mL of water was added, and an organic substance was extracted with toluene. The toluene solution was sequentially washed with sodium thiosulfate and saturated saline. The organic phase was dried with magnesium sulfate and concentrated. Residues were purified by means of silica gel column chromatography, whereby 14.1 g (yield: 98%) of yellow oil of 1-bromo-3,5-bis(2-fluorophenyl)-2,4-dimethoxybenzene was obtained.

(A-5) Synthesis of 1-bromo-3,5-bis(2-fluorophenyl)-2,4-dihydroxybenzene

0203In the atmosphere of argon, 14.1 g of 1-bromo-3,5-bis(2-fluorophenyl)-2,4-dimethoxybenzene and 300 mL of anhydrous dichloromethane were placed in a flask. The resulting mixture was cooled to −78° C. with stirring. Then, 90 mL (1M) of a dichloromethane solution of boron tribromide was added. While heating the reaction solution to room temperature, stirring was conducted for 3 hours. The reaction solution was cooled on ice, and then 150 mL of water was added. An aqueous phase was removed, and an organic phase was dried with magnesium sulfate. After concentrating the organic phase, residues were purified by using a short column, whereby 12.5 g (yield: 95%) of brown oil of 1-bromo-3,5-bis(2-fluorophenyl)-2,4-dihydroxybenzene was obtained.

(A-6) Synthesis of Intermediate (A)

0204In the atmosphere of argon, 12.5 g of 1-bromo-3,5-bis(2-fluorophenyl)-2,4-dihydroxybenzene, 18.3 g of potassium carbonate and 200 mL of anhydrous N-methylpyrrolidinone were placed in a flask. The resulting mixture was stirred with heating at 200° C. for 5 hours. After cooling to room temperature, 200 mL of water was added, and the resultant was diluted with toluene. An aqueous phase was removed, and an organic phase was dried with magnesium sulfate. After concentrating the organic phase, residues were purified by silica gel column chromatography, whereby 1.20 g (yield: 11%) of intermediate (A) was obtained.

(B) Synthesis of Intermediates (B) and (C)

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(B-1) Synthesis of 2,4-bis(2-fluorophenyl)-1,5-dimethoxybenzene

02062,4-dibromo-1,5-dimethoxybenzene (88.8 g, 300 mmol, 1 eq.), 2-fluorophenylboronic acid (100.74 g, 720 mmol, 2.4 eq.), Na₂CO₃2M aq. (600 mL), Pd(PPh₃)₄(6.73 g, 6 mmol, 2 mol %), 1,2-dimethoxyethane (150 mL) and toluene (150 mL) were placed in a flask, and the resulting mixture was refluxed for 36 hours.

0207After completion of the reaction, water (500 mL) and toluene (1 L) were added, and the mixture was transferred to a separating funnel, whereby a toluene phase was collected. After drying with MgSO₄, original impurities were removed by passing through a silica gel short column, thereby to concentrate the solution. The thus concentrated solution was recrystallized from a toluene/hexane mixed solvent, whereby white crystals of 86.5 g (yield: 88%) of 2,4-bis(2-fluorophenyl)-1,5-dimethoxybenzene were obtained.

(B-2) Synthesis of 2,4-bis(2-fluorophenyl)-1,5-dihydroxybenzene

02081,5-dimethoxy-2,4-bis(2-fluorophenyl)benzene (48.3 g, 148 mmol, 1 eq.) and dichloromethane (dehydrated) (740 mL) were placed in a flask, and the resulting mixture was cooled to 0° C. BBr₃(89.0 g, 355 mmol, 2.4 eq.) was added, and the resultant was stirred at room temperature for 24 hours.

0209After completion of the reaction, the solution was cooled to −78° C., and carefully deactivated with methanol, and then with a sufficient amount of water. The solution was transferred to a separating funnel, extracted with dichloromethane, and dried with MgSO₄. Then, original impurities were removed by passing through a silica gel short column, and the solution was concentrated. The resulting sample was dried in vacuum at 60° C. for 5 hours, whereby white solids of 44.1 g (yield: 100%) of 2,4-bis(2-fluorophenyl)-1,5-dihydroxybenzene were obtained.

(B-3) Synthesis of benzofurano[3,2-b]dibenzofuran

02102,4-bis(2-fluorophenyl)-1,5-dihydroxybenzene (44.14 g, 148 mmol, 1 eq.) and N-methyl-2-pyrrolidinone (dehydrated) (888 mL) were placed in a flask. The solids were completely dissolved. K₂CO₃(81.8 g, 592 mmol, 4 eq.) was added, followed by stirring at 200° C. for 2 hours.

0211After completion of the reaction, the solution was cooled to room temperature. Toluene (2 L) was added, the resulting mixture was transferred to a separating funnel, followed by washing with water. After drying with MgSO₄, original impurities were removed by passing through a silica gel short column, and the solution was concentrated. Then, the solution was recrystallized from a toluene/methanol mixed solvent, whereby 27.9 g (yield: 73%) of white solids of benzofurano[3,2-b]dibenzofuran was obtained.

(B-4) Synthesis of 6-iodobenzofurano[3,2-b]dibenzofuran

0212Benzofurano[3,2-b]dibenzofuran (2.69 g, 10.4 mmol, 1 eq.) and tetrahydrofuran (dehydrated) (62 mL) were placed in a flask, and the resulting mixture was cooled to −78° C. n-BuLi ((1.66M in hexane), 6.6 mL, 10.9 mmol, 1.05 eq.) was added, and the resulting mixture was allowed to stand at room temperature for 30 minutes. Subsequently, the mixture was again cooled to −78° C. Then, I₂(2.69 g, 10.6 mmol, 1.02 eq.) was added. The resulting mixture was stirred at −78° C. for 10 minutes, and allowed to stand at room temperature for 1 hour.

0213After completion of the reaction, the reaction solution was deactivated by adding a small amount of water, and then concentrated by means of an evaporator. The thus concentrated solution was dispersed in and washed with water, filtered out, and dissolved in toluene. The resulting solution was dried with MgSO₄, and passed through a silica gel short column, thereby to concentrate this solution. This sample was recrystallized from methanol, whereby 3.77 g (yield: 94%) of white solids of 6-iodobenzofurano[3,2-b]dibenzofuran were obtained.

(C-1) Synthesis of benzofurano[3,2-b]dibenzofuran-6-boronic acid

0214Benzofurano[3,2-b]dibenzofuran (12.9 g, 50 mmol, 1 eg.) and tetrahydrofuran (dehydrated) (300 mL) were placed in a flask, and the resulting mixture was cooled to −78° C. n-BuLi ((2.63M in hexane) 20.0 mL, 52.5 mmol, 1.05 eq.) was added, and the resulting mixture was allowed to stand at room temperature for one hour. Subsequently, the mixture was again cooled to −78° C. Then, B(OMe)₃(10.4 g, 100 mmol, 2 eq.) was added. The resulting mixture was stirred at −78° C. for 10 minutes, and allowed to stand for 1 hour.

0215After completion of the reaction, the reaction solution was concentrated by means of an evaporator until the volume was reduced about to half. Then, 1N HCL aq. (200 mL) was added, and the resulting mixture was stirred at room temperature for 1 hour. Then, the solution was transferred to a separating funnel, and extracted with ethyl acetate.

0216After drying with MgSO₄, this solution was concentrated, and dispersed in and washed with a toluene/hexane mixed solvent, whereby 13.7 g (yield: 91%) of white solids of benzofurano[3,2-b]dibenzofuran-6-boronic acid were obtained.

(D) Synthesis of Intermediate D

0217<chemistry id="CHEM-US-00083" num="00083"><img file="US8629430B2_D0082.tif" /></chemistry>

(D-1) Synthesis of 2′-fluoro-2,3-dimethoxybiphenyl

0218In the atmosphere of argon, 18.2 g of 2,3-dimethoxyphenylboronic acid, 17.5 g of 2-fluorobromobenzene, 2.31 g of tetrakistriphenylphosphine palladium (0), 300 mL of 1,2-dimethoxyethane and 150 mL of an aqueous 2M sodium carbonate solution were placed in a flask. The resulting mixture was stirred with heating under reflux for 8 hours. After cooling to room temperature, an aqueous phase was removed, and an organic phase was washed with saturated saline. The organic phase was dried with magnesium sulfate and then concentrated. Residues were purified by silica gel column chromatography, whereby 19.7 g of (yield 85%) of 2′-fluoro-2,3-dimethoxybiphenyl was obtained.

(D-2) Synthesis of 2′-fluoro-2,3-dimethoxybiphenyl-4-boronic acid

0219In the atmosphere of argon, 19.7 g of 2′-fluoro-2,3-dimethoxybipherlyland 500 mL of anhydrous THF were placed in a flask. 56 mL of a hexane solution of 1.6M n-butyllithium was added, and the reaction solution was stirred at room temperature for 4 hours. After cooling to −78° C., 30 mL of a THF solution of 27.8 g of trimethyl borate was added dropwise. While heating to room temperature, the reaction solution was stirred for 8 hours. 200 mL of 10% HCl was added to the reaction solution, and the resulting mixture was stirred for 2 hours. The reaction solution was extracted with ether. An aqueous phase was removed, and then an organic phase was washed with saturated saline. After drying the organic phase with magnesium sulfate, the organic phase was concentrated, and residues were washed with hexane, whereby 15.2 g (yield: 65%) of 2′-fluoro-2,3-dimethoxybiphenyl-4-boronic acid was obtained.

(D-3) Synthesis of 5-bromo-2-fluoro-2′,3′-dimethoxy-2″-fluoro-p-terphenyl

0220In the atmosphere of argon, 15.2 g of 2′-fluoro-2,3-dimethoxybiphenyl-4-boronic acid, 16.5 g of 2-fluoro-5-bromoiodobenzene, 1.27 g of tetrakistriphenylphosphine palladium (0), 180 mL of toluene and 90 mL of an aqueous 2M sodium carbonate solution were placed in a flask. The resulting solution was stirred with heating under reflux for 8 hours. After cooling to room temperature, the reaction solution was extracted with toluene. An aqueous phase was removed, and an organic phase was washed with saturated saline. The organic phase was dried with magnesium sulfate, and concentrated. Residues were purified by means of silica gel column chromatography, whereby 17.8 g (yield: 80%) of 5-bromo-2-fluoro-2′,3′-dimethoxy-2″-fluoro-p-terphenyl was obtained.

(D-4) Synthesis of 5-bromo-2-fluoro-2′,3′-dihydroxy-2″-fluoro-p-terphenyl

022117.8 g of 5-bromo-2-fluoro-2′,3′-dimethoxy-2″-fluoro-p-terphenyl and 250 mL of dichloromethane (dehydrated) were placed in a flask, and the resulting mixture was cooled to 0° C. 27.5 g of BBr₃was added, and the resultant was stirred at room temperature for 24 hours.

0222After completion of the reaction, the solution was cooled to −78° C., and carefully deactivated with methanol, and then with a sufficient amount of water. The solution was transferred to a separating funnel, extracted with dichloromethane, and dried with MgSO₄. Then, original impurities were removed by passing through a silica gel short column, and the solution was concentrated. The resulting sample was dried in vacuum, whereby 16.5 g (yield: 100%) of 5-bromo-2-fluoro-2′,3′-dihydroxy-2″-fluoro-p-terphenyl was obtained.

(D-5) Synthesis of 3-bromobenzofurano[3,2-c]dibenzofuran

022316.5 g of 5-bromo-2-fluoro-2′,3′-dihydroxy-2″-fluoro-p-terphenyl, 300 mL of N-methyl-2-pyrrolidinone (dehydrated) and 24.2 g of K₂CO₃were placed in a flask, followed by stirring at 200° C. for 2 hours.

0224After completion of the reaction, the solution was cooled to room temperature. Toluene (2 L) was added, and the resulting mixture was transferred to a separating funnel and washed with water. After drying this solution with MgSO₄, original impurities were removed by passing through a silica gel short column, the solution was concentrated, recrystallized from a mixed solvent of toluene/methanol, whereby 10.1 g (yield: 70%) of white solids of 3-bromobenzofurano[3,2-c]dibenzofuran were obtained.

(E) Synthesis of Intermediate (E)

0225<chemistry id="CHEM-US-00084" num="00084"><img file="US8629430B2_D0083.tif" /></chemistry>

(E-1) Synthesis of 7,8,9,10-tetrahydrobenzo[b]naphtho[2,1-d]furan

0226144 g of 1-naphthol, 190 g of p-toluenesulfonic acid monohydrate, 80.1 g of 1,3-cyclohexadiene and 4 L of toluene were placed in a flask. The resulting mixture was stirred under reflux for 24 hours. After cooling to room temperature, the reaction solution was washed with 600 mL of water. After drying an organic phase with magnesium sulfate, the solvent was distilled off under reduced pressure. Residues were purified by silica gel column chromatography, whereby 55.5 g (yield: 25%) of 7,8,9,10-tetrahydrobenzo[b]naphtho[2,1-d]furan was obtained.

(E-2) Synthesis of benzo[b]naphtho[2,1-d]furan

0227In the atmosphere of argon, 55.5 g of 7,8,9,10-tetrahydrobenzo[b]naphtho[2,1-d]furan, 119 g of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone and 1 L of anhydrous 1,4-dioxane were placed in a flask. The resulting mixture was stirred under reflux for 12 hours. After cooling to room temperature, the reaction solution was extracted with toluene, and deposited solids were filtered out. The filtrate was concentrated by means of a rotary evaporator, and residues were purified by silica gel column chromatography, whereby 32.7 g of (yield: 60%) of benzo[b]naphtho[2,1-d]furan was obtained.

(E-3) Synthesis of 5-bromobenzo[b]naphtho[2,1-d]furan

022832.7 g of benzo[b]naphtho[2,1-d]furan was dissolved in 300 mL of N,N-dimethylformamide. Then, 50 mL of a N,N-dimethylformamide solution of 28.0 g of N-bromosuccinimide was added, and the resulting reaction solution was stirred with heating at 60° C. for 5 hours. After cooling to room temperature, the reaction solution was poured in 2 L of water. Solids thus obtained were sequentially washed with methanol, water and methanol. The resulting crude product was purified by means of silica gel column chromatography, whereby 36.5 g (yield: 82%) of 5-bromobenzo[b]naphtho[2,1-d]furan was obtained.

(F) Synthesis of Intermediate (F)

0229<chemistry id="CHEM-US-00085" num="00085"><img file="US8629430B2_D0084.tif" /></chemistry>

(F-1) Synthesis of 2-ethoxy-1-(2-fluoro-5-bromophenyl)naphthalene

0230In the atmosphere of argon, 22.7 g of 2-ethoxynaphthalene-1-boronic acid, 30.0 g of 2-fluoro-5-bromoiodobenzene, 2.31 g of tetrakistriphenylphosphine palladium (0), 300 mL of toluene and 150 mL of an aqueous 2M solution of sodium carbonate were placed in a flask, and the resulting mixture was stirred with heating under reflux for 8 hours. After cooling to room temperature, the reaction solution was extracted with toluene. An aqueous phase was removed, and then, an organic phase was washed with saturated saline. The organic phase was dried with magnesium sulfate, and concentrated. Residues were purified by means of silica gel column chromatography, whereby 24.1 g (yield: 70%) of 2-ethoxy-1-(2-fluoro-5-bromophenyl)naphthalene was obtained.

(F-2) Synthesis of 2-hydroxy-1-(2-fluoro-5-bromophenyl)naphthalene

023124.1 g of 2-ethoxy-1-(2-fluoro-5-bromophenyl)naphthalene and dichloromethane (dehydrated) (200 mL) were placed in a flask. The resulting mixture was cooled to 0° C. 22.0 g of BBr₃was added, and the resultant was stirred at room temperature for 24 hours.

0232After completion of the reaction, the solution was cooled to −78° C., and carefully deactivated with methanol, and then with a sufficient amount of water. The solution was transferred to a separating funnel, extracted with dichloromethane, and dried with MgSO₄. Then, original impurities were removed by passing through a silica gel short column, and the solution was concentrated. The resulting sample was dried in vacuum at 60° C. for 5 hours, whereby white solids of 22.1 g (yield: 100%) of 2-hydroxy-1-(2-fluoro-5-bromophenyl)naphthalene were obtained.

(F-3) Synthesis of Intermediate (F)

023322.1 g of 2-hydroxy-1-(2-fluoro-5-bromophenyl)naphthalene, 300 mL of N-methyl-2-pyrrolidinone (dehydrated) and 19.3 g of K₂CO₃were added, followed by stirring at 200° C. for 2 hours.

0234After completion of the reaction, the solution was cooled to room temperature. Toluene (2 L) was added, and the resulting mixture was transferred to a separating funnel and washed with water. After drying with MgSO₄, the solution was purified by means of silica gel column chromatography, whereby white solids of 13.5 g (yield: 65%) of intermediate (F) were obtained.

(G) Synthesis of Intermediate (G)

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(G-1) Synthesis of 3-methoxynaphthalene-2-boronic acid

023615.8 g of 2-methoxynaphthalene and 300 mL of tetrahydrofuran (dehydrated) were placed in a flask, and the resulting mixture was cooled to −78° C. 66 mL of n-BuLi (1.60M in hexane) was added, and the resulting mixture was stirred at room temperature for 4 hours. The resulting mixture was cooled to −78° C. again. Then, 27.3 of B(OMe)₃was added, stirred at −78° C. for 10 minutes, followed by stirring at room temperature for 5 hours.

0237After completion of the reaction, 1N HCl aq. (200 mL) was added, and the solution was stirred at room temperature for 1 hour. Then, the solution was transferred to a separating funnel, and extracted with ethyl acetate.

0238This solution was dried with MgSO₄, concentrated and washed with hexane, whereby 14.3 g (yield: 71%) of white solids of 3-methoxynaphthalene-2-boronic acid were obtained.

(G-2) Synthesis of 2-methoxy-3-(2-fluorophenyl)naphthalene

0239In the atmosphere of argon, 14.3 g of 3-methoxynaphthalene-2-boronic acid, 12.4 g of 2-fluorobromobenzene, 1.64 g of tetrakistriphenylphosphine palladium (0), 220 mL of 1,2-dimethoxyethane, 110 mL of a 2M aqueous solution of sodium carbonate were placed in a flask, and the resulting mixture was stirred with heating under reflux for 8 hours. After cooling to room temperature, the reaction solution was extracted with toluene. An aqueous phase was removed, and then an organic phase was washed with saturated saline. The organic phase was dried with magnesium sulfate and then concentrated. Residues were purified by silica gel column chromatography, whereby 13.4 g (yield: 75%) of 2-methoxy-3-(2-fluorophenyl)naphthalene was obtained.

(G-3) Synthesis of 1-bromo-2-methoxy-3-(2-fluorophenyl)naphthalene

024013.4 g of 2-methoxy-3-(2-fluorophenyl)naphthalene and 100 mL of N,N-dimethylformamide were placed in a flask. Then, 40 mL of a N,N-dimethylformamide solution of 11.3 g of N-bromosuccinimide was added. The reaction solution was stirred at 60° C. for 8 hours. After cooling to room temperature, 500 mL of water was added. Then, an organic substance was extracted with toluene. The toluene solution was sequentially washed with sodium thiosulfate and saturated saline. After drying with magnesium sulfate, the organic phase was concentrated. Residues were purified by silica gel column chromatography, whereby 15.8 g (yield: 95%) of 1-bromo-2-methoxy-3-(2-fluorophenyl)naphthalene was obtained.

(G-4) Synthesis of 1-bromo-2-hydroxy-3-(2-fluorophenyl)naphthalene

024115.8 g of 1-bromo-2-methoxy-3-(2-fluorophenyl)naphthalene and 200 mL of dichloromethane (dehydrated) were placed in a flask. The resulting mixture was cooled to 0° C. 18.0 g of BBr₃was added, and the resultant was stirred at room temperature for 24 hours.

0242After completion of the reaction, the solution was cooled to −78° C., and carefully deactivated with methanol, and then with a sufficient amount of water. The solution was transferred to a separating funnel, extracted with dichloromethane, and dried with MgSO₄. Then, original impurities were removed by passing through a silica gel short column, and the solution was concentrated. The resulting sample was dried in vacuum at 60° C. for 5 hours, whereby white solids of 15.1 g (yield: 100%) of 1-bromo-2-hydroxy-3-(2-fluorophenyl)naphthalene was obtained.

(G-5) Synthesis of Intermediate (G)

024315.1 g of 1-bromo-2-hydroxy-3-(2-fluorophenyl)naphthalene, 150 mL of N-methyl-2-pyrrolidinone (dehydrated) and 13.2 g of K₂CO₃were placed in a flask. The resulting mixture was stirred at 200° C. for 2 hours.

0244After completion of the reaction, the solution was cooled to room temperature. Toluene (200 mL) was added, and the resulting mixture was transferred to a separating funnel, followed by washing with water. After drying with MgSO₄, this solution was purified by silica gel column chromatography, whereby 2.12 g (yield: 15%) of white solids of intermediate (G) were obtained.

(H) Synthesis of Intermediate (H)

0245<chemistry id="CHEM-US-00087" num="00087"><img file="US8629430B2_D0086.tif" /></chemistry>

0246An intermediate (H) was synthesized in the same manner as in the synthesis of intermediate (F) according to the above scheme, except that 2-fluoro-4-bromoiodobenzene was used instead of 2-fluoro-5-bromoiodobenzene.

0247<chemistry id="CHEM-US-00088" num="00088"><img file="US8629430B2_D0087.tif" /></chemistry>

0248A derivative (H-1) of the above-mentioned intermediate (H) was synthesized in the same manner as in Example 37.

(I) Synthesis of Intermediate (I)

0249<chemistry id="CHEM-US-00089" num="00089"><img file="US8629430B2_D0088.tif" /></chemistry>

(1) Synthesis of 3-(4-bromo-2-fluorophenyl)-2-methoxynaphthalene

0250Synthesis was conducted in the same manner as in (G-2), except that 2-fluoro-4-bromoiodobenzene was used instead of 2-fluorobromobenzene.

(2) Synthesis of 3-(4-bromo-2-fluorophenyl)-2-hydroxynaphthalene

0251Synthesis was conducted in the same manner as in (G-4), except that 3-(4-bromo-2-fluorophenyl)-2-methoxynaphthalene was used instead of 1-bromo-2-methoxy-3-(2-fluorophenyl)naphthalene.

(3) Synthesis of Intermediate (I)

0252Synthesis was conducted in the same manner as in (G-5), except that 3-(4-bromo-2-fluorophenyl)-2-hydroxynaphthalene was used instead of 1-bromo-2-hydroxy-3-(2-fluorophenyl)naphthalene.

(4) Synthesis of Intermediate (I) —B(OH)

2

0253Synthesis was conducted in the same manner as in (37-1), except that intermediate (I) was used instead of 10-bromobenzo[b]naphtho[1,2-d]furan.

(J) Synthesis of Intermediate (J)

0254<chemistry id="CHEM-US-00090" num="00090"><img file="US8629430B2_D0089.tif" /></chemistry>

(1) Synthesis of 5-bromobenzo[b]naphtho[2,1-d]thiophene

0255Synthesis was conducted in the same manner as in the synthesis of intermediate (E), except that benzo[b]naphtho[2,1-d]thiophene was used instead of benzo[b]naphtho[2,1-d]furan.

(2) Synthesis of benzo[b]naphtho[2,1-d]thiophene-5-boronic acid

0256Synthesis was conducted in (41-1), except that 5-bromobenzo[b]naphtho[2,1-d]thiophene was used instead of 5-bromobenzo[b]naphtho[2,1-d]furan.

Example 1

0257<chemistry id="CHEM-US-00091" num="00091"><img file="US8629430B2_D0090.tif" /></chemistry>

0258In the atmosphere of argon, 3.84 g of intermediate (B), 3.83 g of 10-(2-naphthyl)anthracene-9-boronic acid which was synthesized by a known method, 0.231 g of tetrakis(triphenylphosphine)palladium (0), 40 mL of 1,2-dimethoxyethane and 20 mL of a 2M aqueous sodium carbonate solution were charged. The resulting mixture was stirred under reflux for 8 hours. After cooling to room temperature, deposited solids were filtered out. The solids thus obtained were washed with water and methanol, recrystallized from toluene, whereby 4.20 g of pale yellow solids of compound 1 were obtained. As a result of mass spectroscopy, it was confirmed that the solids were an intended product having an m/e of 560 relative to the molecular weight of 560.18.

Example 2

0259<chemistry id="CHEM-US-00092" num="00092"><img file="US8629430B2_D0091.tif" /></chemistry>

0260Compound 2 was obtained in the same manner as in Example 1, except that 10-(1-naphthyl)anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 636 relative to the molecular weight of 636.21.

Example 3

0261<chemistry id="CHEM-US-00093" num="00093"><img file="US8629430B2_D0092.tif" /></chemistry>

0262Compound 3 was obtained in the same manner as in Example 1, except that 10-[3-(2-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 636 relative to the molecular weight of 636.21.

Example 4

0263<chemistry id="CHEM-US-00094" num="00094"><img file="US8629430B2_D0093.tif" /></chemistry>

0264Compound 4 was obtained in the same manner as in Example 1, except that 10-[3-(1-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 636 relative to the molecular weight of 636.21.

Example 5

0265<chemistry id="CHEM-US-00095" num="00095"><img file="US8629430B2_D0094.tif" /></chemistry>

0266Compound 5 was obtained in the same manner as in Example 1, except that intermediate (D) was used instead of intermediate (B). As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 560 relative to the molecular weight of 560.18.

Example 6

0267<chemistry id="CHEM-US-00096" num="00096"><img file="US8629430B2_D0095.tif" /></chemistry>

0268Compound 6 was obtained in the same manner as in Example 1, except that intermediate (D) was used instead of intermediate (B) and 10-(1-naphthyl)anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 560 relative to the molecular weight of 560.18.

Example 7

0269<chemistry id="CHEM-US-00097" num="00097"><img file="US8629430B2_D0096.tif" /></chemistry>

0270Compound 7 was obtained in the same manner as in Example 1, except that intermediate (D) was used instead of intermediate (B) and 10-[3-(2-naphthyl)]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 636 relative to the molecular weight of 636.21.

Example 8

0271<chemistry id="CHEM-US-00098" num="00098"><img file="US8629430B2_D0097.tif" /></chemistry>

0272Compound 8 was obtained in the same manner as in Example 1, intermediate (D) was used instead of intermediate (B) and 10-[3-(1-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 636 relative to the molecular weight of 636.21.

Example 9

0273<chemistry id="CHEM-US-00099" num="00099"><img file="US8629430B2_D0098.tif" /></chemistry>

0274Compound 9 was obtained in the same manner as in Example 1, except that intermediate (A) was used instead of intermediate (B). As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 560 relative to the molecular weight of 560.18.

Example 10

0275<chemistry id="CHEM-US-00100" num="00100"><img file="US8629430B2_D0099.tif" /></chemistry>

0276Compound 10 was obtained in the same manner as in Example 1, except that intermediate (A) was used instead of intermediate (B) and 10-(1-naphthyl)anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 560 relative to the molecular weight of 560.18.

Example 11

0277<chemistry id="CHEM-US-00101" num="00101"><img file="US8629430B2_D0100.tif" /></chemistry>

0278Compound 11 was obtained in the same manner as in Example 1, intermediate (A) was used instead of intermediate (B) and 10-[3-(2-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 636 relative to the molecular weight of 636.21.

Example 12

0279<chemistry id="CHEM-US-00102" num="00102"><img file="US8629430B2_D0101.tif" /></chemistry>

0280Compound 12 was obtained in the same manner as in Example 1, intermediate (A) was used instead of intermediate (B) and 10-[3-(1-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 636 relative to the molecular weight of 636.21.

Example 13

0281<chemistry id="CHEM-US-00103" num="00103"><img file="US8629430B2_D0102.tif" /></chemistry>

0282Compound 13 was obtained in the same manner as in Example 1, except that intermediate (E) was used instead of intermediate (B). As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 520 relative to the molecular weight of 520.18.

Example 14

0283<chemistry id="CHEM-US-00104" num="00104"><img file="US8629430B2_D0103.tif" /></chemistry>

0284Compound 14 was obtained in the same manner as in Example 1, except that intermediate (E) was used instead of intermediate (B) and 10-(1-naphthyl)anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 520 relative to the molecular weight of 520.18.

Example 15

0285<chemistry id="CHEM-US-00105" num="00105"><img file="US8629430B2_D0104.tif" /></chemistry>

0286Compound 15 was obtained in the same manner as in Example 1, except that intermediate (E) was used instead of intermediate (B) and 10-[3-(2-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 596 relative to the molecular weight of 596.21.

Example 16

0287<chemistry id="CHEM-US-00106" num="00106"><img file="US8629430B2_D0105.tif" /></chemistry>

0288Compound 16 was obtained in the same manner as in Example 1, intermediate (E) was used instead of intermediate (B) and 10-[3-(1-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 596 relative to the molecular weight of 596.21.

Example 17

0289<chemistry id="CHEM-US-00107" num="00107"><img file="US8629430B2_D0106.tif" /></chemistry>

0290Compound 17 was obtained in the same manner as in Example 1, except that intermediate (F) was used instead of intermediate (B). As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 520 relative to the molecular weight of 520.18.

Example 18

0291<chemistry id="CHEM-US-00108" num="00108"><img file="US8629430B2_D0107.tif" /></chemistry>

0292Compound 18 was obtained in the same manner as in Example 1, except that intermediate (F) was used instead of intermediate (B) and 10-(1-naphthyl)anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 520 relative to the molecular weight of 520.18.

Example 19

0293<chemistry id="CHEM-US-00109" num="00109"><img file="US8629430B2_D0108.tif" /></chemistry>

0294Compound 19 was obtained in the same manner as in Example 1, except that intermediate (F) was used instead of intermediate (B) and 10-[3-(2-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 596 relative to the molecular weight of 596.21.

Example 20

0295<chemistry id="CHEM-US-00110" num="00110"><img file="US8629430B2_D0109.tif" /></chemistry>

0296Compound 20 was obtained in the same manner as in Example 1, except that intermediate (F) was used instead of intermediate (B) and 10-[3-(1-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 596 relative to the molecular weight of 596.21.

Example 21

0297<chemistry id="CHEM-US-00111" num="00111"><img file="US8629430B2_D0110.tif" /></chemistry>

0298Compound 21 was obtained in the same manner as in Example 1, except that intermediate (G) was used instead of intermediate (B). As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 520 relative to the molecular weight of 520.18.

Example 22

0299<chemistry id="CHEM-US-00112" num="00112"><img file="US8629430B2_D0111.tif" /></chemistry>

0300Compound 22 was obtained in the same manner as in Example 1, except that intermediate (G) was used instead of intermediate (B) and 10-(1-naphthyl)anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 520 relative to the molecular weight of 520.18.

Example 23

0301<chemistry id="CHEM-US-00113" num="00113"><img file="US8629430B2_D0112.tif" /></chemistry>

0302Compound 23 was obtained in the same manner as in Example 1, except that intermediate (G) was used instead of intermediate (B) and 10-[3-(2-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 596 relative to the molecular weight of 596.21.

Example 24

0303<chemistry id="CHEM-US-00114" num="00114"><img file="US8629430B2_D0113.tif" /></chemistry>

0304Compound 24 was obtained in the same manner as in Example 1, except that intermediate (G) was used instead of intermediate (B) and 10-[3-(1-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 596 relative to the molecular weight of 596.21.

Example 25

0305<chemistry id="CHEM-US-00115" num="00115"><img file="US8629430B2_D0114.tif" /></chemistry>

(25-1) Synthesis of 6-(3-bromophenyl)benzofurano[3,2-b]dibenzofuran

0306In the atmosphere of argon, 3.17 g of benzofurano[3,2-b]dibenzofuran-6-boronic acid, 2.83 g of 3-bromoiodobenzene, 0.231 g of tetrakis(triphenylphosphine)palladium (0), 40 mL of toluene and 20 mL of a 2M aqueous sodium carbonate solution were placed in a flask. The resulting mixture was stirred with heating under reflux for 8 hours. After cooling to room temperature, an aqueous phase was removed. An organic phase was extracted with toluene, dried with magnesium sulfate and concentrated. Residues were purified by silica gel column chromatography, whereby 3.39 g (yield: 82%) of 6-(3-bromophenyl)benzofurano[3,2-b]dibenzofuran was obtained.

(25-2) Synthesis of Compound 25

0307Compound 25 was obtained in the same manner as in Example 1, except that 6-(3-bromophenyl)benzofurano[3,2-b]dibenzofuran was used instead of intermediate (B). As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 636 relative to the molecular weight of 636.21.

Example 26

0308<chemistry id="CHEM-US-00116" num="00116"><img file="US8629430B2_D0115.tif" /></chemistry>

0309Compound 26 was obtained in the same manner as in Example 1, except that 6-(3-bromophenyl)benzofurano[3,2-b]dibenzofuran was used instead of intermediate (B) and 10-(1-naphthyl)anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 636 relative to the molecular weight of 636.21.

Example 27

0310<chemistry id="CHEM-US-00117" num="00117"><img file="US8629430B2_D0116.tif" /></chemistry>

0311Compound 27 was obtained in the same manner as in Example 1, except that 6-(3-bromophenyl)benzofurano[3,2-b]dibenzofuran was used instead of intermediate (B) and 10-[(3-(2-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 712 relative to the molecular weight of 712.24.

Example 28

0312<chemistry id="CHEM-US-00118" num="00118"><img file="US8629430B2_D0117.tif" /></chemistry>

0313Compound 28 was obtained in the same manner as in Example 1, except that 6-(3-bromophenyl)benzofurano[3,2-b]dibenzofuran was used instead of intermediate (B) and 10-[(3-(1-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 712 relative to the molecular weight of 712.24.

Example 29

0314<chemistry id="CHEM-US-00119" num="00119"><img file="US8629430B2_D0118.tif" /></chemistry>

(29-1) Synthesis of benzofurano[3,2-c]dibenzofuran-3-boronic acid

031533.5 g of 3-bromobenzofurano[3,2-c]dibenzofuran and 500 mL of tetrahydrofuran (dehydrated) were placed in a flask. The resulting mixture was cooled to −78° C. 66 mL of n-BuLi (1.60M in hexane) was added thereto. While heating to 0° C., the resulting solution was stirred for 2 hours. Then, the solution was again cooled to −78° C., and 27.3 g of B(OMe)₃was added thereto. After stirring at −78° C. for 10 minutes, the solution was stirred at room temperature for 5 hours.

0316After completion of the reaction, 1N HCl aq. (200 mL) was added, followed by stirring at room temperature for 1 hour. Then, the solution was transferred to a separating funnel, and extracted with ethyl acetate.

0317After drying with MgSO₄, the solution was concentrated and washed with hexane, whereby 19.6 g (yield: 65%) of white solids of 3-bromobenzofurano[3,2-c]dibenzofuran were obtained.

(29-2) Synthesis of 3-(3-bromophenyl)benzofurano[3,2-c]dibenzofuran

0318In the atmosphere of argon, 19.6 g of benzofurano[3,2-c]dibenzofuran-3-boronic acid, 18.4 g of 3-bromoiodobenzene, 1.50 g of tetrakis(triphenylphosphine)palladium (0), 200 mL of toluene and 100 mL of a 2M aqueous sodium carbonate solution were placed in a flask. The resulting mixture was stirred with heating under reflux for 8 hours. After cooling to room temperature, the reaction solution was extracted with toluene. An aqueous phase was removed and an organic phase was dried with magnesium sulfate and concentrated. Residues were purified by silica gel column chromatography, whereby 21.4 g of 3-(3-bromophenyl)benzofurano[3,2-c]dibenzofuran was obtained.

(29-3) Synthesis of Compound 29

0319Compound 29 was synthesized in the same manner as in Example 1, except that 3-(3-bromophenyl)benzofurano[3,2-c]dibenzofuran was used instead of intermediate (B). As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 636 relative to the molecular weight of 636.21.

Example 30

0320<chemistry id="CHEM-US-00120" num="00120"><img file="US8629430B2_D0119.tif" /></chemistry>

0321Compound 30 was synthesized in the same manner as in Example 1, except that 3-(3-bromophenyl)benzofurano[3,2-c]dibenzofuran was used instead of intermediate (B) and 10-(1-naphthyl)anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 636 relative to the molecular weight of 636.21.

Example 31

0322<chemistry id="CHEM-US-00121" num="00121"><img file="US8629430B2_D0120.tif" /></chemistry>

0323Compound 31 was synthesized in the same manner as in Example 1, except that 3-(3-bromophenyl)benzofurano[3,2-c]dibenzofuran was used instead of intermediate (B) and 10-[3-(2-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(1-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 712 relative to the molecular weight of 712.24.

Example 32

0324<chemistry id="CHEM-US-00122" num="00122"><img file="US8629430B2_D0121.tif" /></chemistry>

0325Compound 32 was synthesized in the same manner as in Example 1, except that 3-(3-bromophenyl)benzofurano[3,2-c]dibenzofuran was used instead of intermediate (B) and 10-[3-(1-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 712 relative to the molecular weight of 712.24.

Example 33

0326<chemistry id="CHEM-US-00123" num="00123"><img file="US8629430B2_D0122.tif" /></chemistry>

(33-1) Synthesis of benzofurano[2,3-c]dibenzofuran-6-boronic acid

032733.5 g of 6-bromobenzofurano[2,3-c]dibenzofuran and 500 mL of tetrahydrofuran (dehydrated) were placed in a flask. The resulting mixture was cooled to −78° C. 66 mL of n-BuLi (1.60M in hexane) was added thereto. While heating to 0° C., the resulting solution was stirred for 2 hours. Then, the solution was again cooled to −78° C., and 27.3 g of B(OMe)₃was added thereto. After stirring at −78° C. for 10 minutes, the solution was stirred at room temperature for 5 hours.

0328After completion of the reaction, 1N HCl aq. (200 mL) was added, followed by stirring at room temperature for 1 hour. Then, the solution was transferred to a separating funnel, and extracted with ethyl acetate.

0329After drying with MgSO₄, the solution was concentrated and washed with hexane, whereby 19.6 g (yield: 65%) of white solids of benzofurano[2,3-c]dibenzofuran-6-boronic acid were obtained.

(33-2) Synthesis of 6-(3-bromophenyl)benzofurano[2,3-c]dibenzofuran

0330In the atmosphere of argon, 19.6 g of benzofurano[2,3-c]dibenzofuran-6-boronic acid, 18.4 g of 3-bromoiodobenzene, 1.50 g of tetrakis(triphenylphosphine)palladium (0), 200 mL of toluene and 100 mL of a 2M aqueous sodium carbonate solution were placed in a flask. The resulting mixture was stirred with heating under reflux for 8 hours. After cooling to room temperature, the reaction solution was extracted with toluene. An aqueous phase was removed and an organic phase was dried with magnesium sulfate and concentrated. Residues were purified by silica gel column chromatography, whereby 21.4 g of 6-(3-bromophenyl)benzofurano[2,3-c]dibenzofuran was obtained.

(33-3) Synthesis of Compound 33

0331Compound 33 was synthesized in the same manner as in Example 1, except that 6-(3-bromophenyl)benzofurano[2,3-c]dibenzofuran was used instead of intermediate (B). As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 636 relative to the molecular weight of 636.21.

Example 34

0332<chemistry id="CHEM-US-00124" num="00124"><img file="US8629430B2_D0123.tif" /></chemistry>

0333Compound 34 was synthesized in the same manner as in Example 1, except that 6-(3-bromophenyl)benzofurano[2,3-c]dibenzofuran was used instead of intermediate (B) and 10-(1-naphthyl)anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 636 relative to the molecular weight of 636.21.

Example 35

0334<chemistry id="CHEM-US-00125" num="00125"><img file="US8629430B2_D0124.tif" /></chemistry>

0335Compound 35 was synthesized in the same manner as in Example 1, except that 6-(3-bromophenyl)benzofurano[2,3-c]benzofuran was used instead of intermediate (B) and 10-[3-(2-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 712 relative to the molecular weight of 712.24.

0336<chemistry id="CHEM-US-00126" num="00126"><img file="US8629430B2_D0125.tif" /></chemistry>

0337Compound 36 was synthesized in the same manner as in Example 1, except that 6-(3-bromophenyl)benzofurano[2,3-c]benzofuran was used instead of intermediate (B) and 10-[3-(1-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 712 relative to the molecular weight of 712.24.

Example 37

0338<chemistry id="CHEM-US-00127" num="00127"><img file="US8629430B2_D0126.tif" /></chemistry>

(37-1) Synthesis of benzo[b]naphtho[1,2-d]furan-10-boronic acid

033929.7 g of 10-bromobenzo[b]naphtho[1,2-d]furan and 500 mL of tetrahydrofuran (dehydrated) were placed in a flask. The resulting mixture was cooled to −78° C. 66 mL of n-BuLi (1.60M in hexane) was added thereto. While heating to 0° C., the resulting solution was stirred for 2 hours. Then, the solution was again cooled to −78° C., and 27.3 g of B(OMe)₃was added thereto. After stirring at −78° C. for 10 minutes, the solution was stirred at room temperature for 5 hours.

0340After completion of the reaction, 1N HCl aq. (200 mL) was added, followed by stirring at room temperature for 1 hour. Then, the solution was transferred to a separating funnel, and extracted with ethyl acetate.

0341After drying with MgSO₄, the solution was concentrated and washed with hexane, whereby 17.0 g (yield: 65%) of white solids of benzo[b]naphtho[1,2-d]furan-10-boronic acid were obtained.

(37-2) Synthesis of 10-(3-bromophenyl)benzo[b]naphtho[1,2-d]furan

0342In the atmosphere of argon, 17.0 g of benzo[b]naphtho[1,2-d]furan-10-boronic acid, 18.4 g of 3-bromoiiodobenzene, 1.50 g of tetrakistriphenylphosphine palladium (0), 200 mL of toluene and 100 mL of a 2M aqueous sodium carbonate solution were placed in a flask. The resulting mixture was stirred with heating under reflux for 8 hours. After cooling to room temperature, the reaction solution was extracted with toluene. An aqueous phase was removed. An organic phase was dried with magnesium sulfate and concentrated. Residues were purified by silica gel column chromatography, whereby 21.8 g of 10-(3-bromophenyl)benzo[b]naphtho[1,2-d]furan was obtained.

(37-3) Synthesis of Compound 37

0343Compound 37 was obtained in the same manner as in Example 1, except that 10-(3-bromophenyl)benzo[b]naphtho[1,2-d]furan was used instead of intermediate (B). As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 596 relative to the molecular weight of 596.21.

Example 38

0344<chemistry id="CHEM-US-00128" num="00128"><img file="US8629430B2_D0127.tif" /></chemistry>

0345Compound 38 was synthesized in the same manner as in Example 1, except that 10-(3-bromophenyl)benzo[b]naphtho[1,2-d]furan was used instead of intermediate (B) and 10-(1-naphthyl)anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 596 relative to the molecular weight of 596.21.

Example 39

0346<chemistry id="CHEM-US-00129" num="00129"><img file="US8629430B2_D0128.tif" /></chemistry>

0347Compound 39 was synthesized in the same manner as in Example 1, except that 10-(3-bromophenyl)benzo[b]naphtho[1,2-d]furan was used instead of intermediate (B) and 10-[3-(2-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 672 relative to the molecular weight of 672.25.

Example 40

0348<chemistry id="CHEM-US-00130" num="00130"><img file="US8629430B2_D0129.tif" /></chemistry>

0349Compound 40 was obtained in the same manner as in Example 1, except that 10-(3-bromophenyl)benzo[b]naphtho[1,2-d]furan was used instead of intermediate (B) and 10-[3-(1-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 672 relative to the molecular weight of 672.25.

Example 41

0350<chemistry id="CHEM-US-00131" num="00131"><img file="US8629430B2_D0130.tif" /></chemistry>

(41-1) Synthesis of benzo[b]naphtho[2,1-d]furan-5-boronic acid

035129.7 g of 5-bromobenzo[b]naphtho[2,1-d]furan and 500 mL of tetrahydrofuran (dehydrated) were placed in a flask. The resulting mixture was cooled to −78° C. 66 mL of n-BuLi (1.60M in hexane) was added thereto. While heating to 0° C., the resulting solution was stirred for 2 hours. Then, the solution was again cooled to −78° C., and 27.3 g of B(OMe)₃was added thereto. After stirring at −78° C. for 10 minutes, the solution was stirred at room temperature for 5 hours.

0352After completion of the reaction, 1N HCl aq. (200 mL) was added, followed by stirring at room temperature for 1 hour. Then, the solution was transferred to a separating funnel, and extracted with ethyl acetate.

0353After drying with MgSO₄, the solution was concentrated and washed with hexane, whereby 17.0 g (yield: 65%) of white solids of benzo[b]naphtho[2,1-d]furan-5-boronic acid were obtained.

(41-2) Synthesis of 5-(3-bromophenyl)benzo[b]naphtho[2,1-d]furan

0354In the atmosphere of argon, 17.0 g of benzo[b]naphtho[2,1-d]furan-5-bronic acid, 18.4 g of 3-bromoiodobenzene, 1.50 g of tetrakistriphenylphosphine palladium (0), 200 mL of toluene and 100 mL of a 2M aqueous sodium carbonate solution were placed in a flask. The resulting mixture was stirred with heating under reflux for 8 hours. After cooling to room temperature, the reaction solution was extracted with toluene. An aqueous phase was removed. An organic phase was dried with magnesium sulfate and concentrated. Residues were purified by silica gel column chromatography, whereby 21.8 g of 5-(3-bromophenypbenzo[b]naphtho[2,1-d]furan was obtained.

(41-3) Synthesis of Compound 41

0355Compound 41 was synthesized in the same manner as in Example 1, except that 5-(3-bromophenyl)benzo[b]naphtho[2,1-d]furan was used instead of intermediate (B). As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 596 relative to the molecular weight of 596.21.

Example 42

0356<chemistry id="CHEM-US-00132" num="00132"><img file="US8629430B2_D0131.tif" /></chemistry>

0357Compound 42 was synthesized in the same manner as in Example 1, except that 5-(3-bromophenyl)benzo[b]naphtho[2,1-d]furan was used instead of intermediate (B) and 10-(1-naphthyl)anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 596 relative to the molecular weight of 596.21.

Example 43

0358<chemistry id="CHEM-US-00133" num="00133"><img file="US8629430B2_D0132.tif" /></chemistry>

0359Compound 43 was synthesized in the same manner as in Example 1, except that 5-(3-bromophenyl)benzo[b]naphtho[2,1-d]furan was used instead of intermediate (B) and 10-[3-(2-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 672 relative to the molecular weight of 672.25.

Example 44

0360<chemistry id="CHEM-US-00134" num="00134"><img file="US8629430B2_D0133.tif" /></chemistry>

0361Compound 44 was obtained in the same manner as in Example 1, except that 5-(3-bromophenyl)benzo[b]naphtho[2,1-d]furan was used instead of intermediate (B) and 10-[3-(1-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 672 relative to the molecular weight of 672.25.

Example 45

0362<chemistry id="CHEM-US-00135" num="00135"><img file="US8629430B2_D0134.tif" /></chemistry>

(45-1) Synthesis of benzo[b]naphtho[2,3-d]furan-5-boronic acid

036329.7 g of 5-bromobenzo[b]naphtho[2,3-d]furan and 500 mL of tetrahydrofuran (dehydrated) were placed in a flask. The resulting mixture was cooled to −78° C. 66 mL of n-BuLi (1.60M in hexane) was added thereto. While heating to 0° C., the resulting solution was stirred for 2 hours. Then, the solution was again cooled to −78° C., and 27.3 g of B(OMe)₃was added thereto. After stirring at −78° C. for 10 minutes, the solution was stirred at room temperature for 5 hours.

0364After completion of the reaction, 1N HCl aq. (200 mL) was added, followed by stirring at room temperature for 1 hour. Then, the solution was transferred to a separating funnel, and extracted with ethyl acetate.

0365After drying with MgSO₄, the solution was concentrated and washed with hexane, whereby 17.0 g (yield: 65%) of white solids of benzo[b]naphtho[2,3-d]furan-5-boronic acid were obtained.

(45-2) Synthesis of 5-(3-bromophenyl)benzo[b]naphtho[2,3-d]furan

0366In the atmosphere of argon, 17.0 g of benzo[b]naphtho[2,3-d]furan-5-boronic acid, 18.4 g of 3-bromoiodobenzene, 1.50 g of tetrakistriphenylphosphine palladium (0), 200 mL of toluene and 100 mL of a 2M aqueous sodium carbonate solution were placed in a flask. The resulting mixture was stirred with heating under reflux for 8 hours. After cooling to room temperature, the reaction solution was extracted with toluene. An aqueous phase was removed. An organic phase was dried with magnesium sulfate and concentrated. Residues were purified by silica gel column chromatography, whereby 21.8 g of 5-(3-bromophenyl)benzo[b]naphtho[2,3-d]furan was obtained.

(45-3) Synthesis of Compound 45

0367Compound 45 was synthesized in the same manner as in Example 1, except that 5-(3-bromophenyl)benzo[b]naphtho[2,3-d]furan was used instead of intermediate (B). As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 596 relative to the molecular weight of 596.21.

Example 46

0368<chemistry id="CHEM-US-00136" num="00136"><img file="US8629430B2_D0135.tif" /></chemistry>

0369Compound 46 was synthesized in the same manner as in Example 1, except that 5-(3-bromophenyl)benzo[b]naphtho[2,3-d]furan was used instead of intermediate (B) and 10-(1-naphthyl)antrhacene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)-anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 596 relative to the molecular weight of 596.21.

Example 47

0370<chemistry id="CHEM-US-00137" num="00137"><img file="US8629430B2_D0136.tif" /></chemistry>

0371Compound 47 was synthesized in the same manner as in Example 1, except that 5-(3-bromophenyl)benzo[b]naphtho[2,3-d]furan was used instead of intermediate (B) and 10-[3-(2-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)-anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 672 relative to the molecular weight of 672.25.

Example 48

0372<chemistry id="CHEM-US-00138" num="00138"><img file="US8629430B2_D0137.tif" /></chemistry>

0373Compound 48 was synthesized in the same manner as in Example 1, except that 5-(3-bromophenyl)benzo[b]naphtho[2,3-d]furan was used instead of intermediate (B) and 10-[3-(1-naphthyl)phenyl]anthracene-9-boronic acid which was synthesized by a known method was used instead of 10-(2-naphthyl)-anthracene-9-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 672 relative to the molecular weight of 672.25.

Example 49

0374<chemistry id="CHEM-US-00139" num="00139"><img file="US8629430B2_D0138.tif" /></chemistry>

(49-1) Synthesis of 2-[benzofurano[3,2-b]dibenzofuran-6-yl]-9,10-anthraquinone

0375In the atmosphere of argon, 28.5 g of 2-bromoantraquinone, 30.2 g of benzofurano[3,2-b]dibenzofuran-6-boronic acid, 2.31 g of tetrakistriphenylphosphine palladium (0), 400 mL of 1,2-dimethoxyethane and 200 mL of a 2M aqueous sodium carbonate solution were placed in a flask. The resulting mixture was stirred with heating under reflux for 8 hours. The resulting mixture was cooled to room temperature, and deposited solids were filtered out. The resulting solids were washed with water and methanol, and recrystallized from toluene, whereby 30.2 g (yield: 65%) of 2-[benzofurano[3,2-b]dibenzofuran-6-yl]-9,10-anthraquinone was obtained.

(49-2) Synthesis of 2-[benzofurano[3,2-b]dibenzofuran-6-yl]-9,10-dihydroxy-9,10-di(2-naphthyl)-9,10-dihydroanthracene

0376In the atmosphere of argon, 28.2 g of 2-bromonaphthalene and 500 mL of dehydrated THF were placed in a flask. The resulting mixture was cooled to −78° C. while stirring. Then, 85 mL (1.60M) of a hexane solution of n-butyllithium was added. While heating to 0° C., the reaction solution was stirred for 2 hours. The reaction solution was again cooled to −78° C. 500 mL of a solution of 30.2 g of 2-[benzofurano[2,3-b]dibenzofuran-6-yl]-9,10-anthraquinone was added dropwise. While heating to room temperature, the reaction solution was stirred for 5 hours. 200 mL of 10% hydrochloric acid was added to the reaction solution, and the resultant was stirred for one hour. Then, the reaction solution was extracted with ethyl acetate. An aqueous phase was removed, and an organic phase was dried with magnesium sulfate. The organic phase was then concentrated, whereby 42.1 g of 2-[benzofurano[3,2-b]dibenzofuran-6-yl]-9,10-dihydroxy-9,10-di(2-naphthyl)-9,10-dihydroanthracene was obtained.

(49-3) Synthesis of Compound 49

037742.1 g of 2-[benzofurano[3,2-b]dibenzofuran-6-yl]-9,10-dihydroxy-9,10-di(2-naphthyl)-9,10-dihydroanthracene, 24.3 g of potassium iodide, 7.74 g of sodium phosphinate monohydrate and 500 mL of acetic acid were placed in a flask. The resultant was stirred with heating under reflux for 8 hours. Water was added to the reaction solution, and the resulting mixture was stirred for one hour. The deposited solids were filtered out. The resulting solids were washed with methanol and recrystallized from toluene, whereby 24.0 g of yellow crystals of compound 49 were obtained. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 686 relative to the molecular weight of 686.22.

Example 50

0378<chemistry id="CHEM-US-00140" num="00140"><img file="US8629430B2_D0139.tif" /></chemistry>

0379Compound 50 was synthesized in the same manner as in Example 49, except that benzofurano[3,2-c]dibenzofuran-3-boronic acid was used instead of benzofurano[3,2-b]dibenzofuran-6-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 686 relative to the molecular weight of 686.22.

Example 51

0380<chemistry id="CHEM-US-00141" num="00141"><img file="US8629430B2_D0140.tif" /></chemistry>

0381Compound 51 was synthesized in the same manner as in Example 49, except that benzo[b]naphtho[2,1-d]furan-5-boronic acid was used instead of benzofurano[3,2-b]dibenzofuran-6-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 686 relative to the molecular weight of 686.22.

Example 52

0382<chemistry id="CHEM-US-00142" num="00142"><img file="US8629430B2_D0141.tif" /></chemistry>

0383Compound 52 was synthesized in the same manner as in Example 49, except that benzo[b]naphtho[1,2-d]furan-10-boronic acid was used instead of benzofurano[3,2-b]dibenzofuran-6-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 646 relative to the molecular weight of 646.23.

0384<chemistry id="CHEM-US-00143" num="00143"><img file="US8629430B2_D0142.tif" /></chemistry>

0385Compound 53 was synthesized in the same manner as in Example 49, except that benzo[b]naphtho[2,1-d]furan-10-boronic acid was used instead of benzofurano[3,2-b]dibenzofuran-6-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 646 relative to the molecular weight of 646.23.

Example 54

0386<chemistry id="CHEM-US-00144" num="00144"><img file="US8629430B2_D0143.tif" /></chemistry>

0387Compound 54 was synthesized in the same manner as in Example 49, except that benzo[b]naphtho[2,3-d]furan-5-boronic acid was used instead of benzofurano[3,2-b]dibenzofuran-6-boronic acid. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 646 relative to the molecular weight of 646.23.

Example 55

0388<chemistry id="CHEM-US-00145" num="00145"><img file="US8629430B2_D0144.tif" /></chemistry><br /> (1) Synthesis of Diol

0389In the atmosphere of argon, 7.43 g of intermediate (F) and 100 mL of dehydrated THF were placed in a flask. The resulting mixture was cooled to −78° C. while stirring. Then, 20 mL of (1.60M) of a hexane solution of n-butyllithium was added. While heating to 0° C., the reaction solution was stirred for 2 hours. The reaction solution was again cooled to −78° C. 50 mL of a THF solution of 2.08 g of 9,10-anthraquinone was added dropwise. While heating to room temperature, the reaction solution was stirred for 5 hours. 100 mL of 10% hydrochloric acid was added to the reaction solution. The solution was stirred for one hour, and then filtered. The resulting solids were washed with water and toluene, whereby 4.51 g of diol 55-(OH)₂was obtained.

0000(2) Synthesis of Compound 55

03904.51 g of 55-(OH)₂, 0.93 g of potassium iodide, 0.30 g of sodium phosphinate monohydrate and 100 mL of acetic acid were placed in a flask. The resulting mixture was stirred with heating under reflux for 8 hours. Water was added to the reaction solution, and stirred for one hour. Deposited solids were filtered out. The resulting solids were washed with methanol, recrystallized from chlorobenzene, whereby 3.20 g of yellow crystals of compound 55 were obtained. As a result of mass spectroscopy, it was confirmed that these crystals were an intended product having an m/e of 610 relative to the molecular weight of 610.19.

Example 56

0391<chemistry id="CHEM-US-00146" num="00146"><img file="US8629430B2_D0145.tif" /></chemistry>

0392Compound 56 was synthesized in the same manner as in Example 55, except that intermediate (E) was used instead of intermediate (F). As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 610 relative to the molecular weight of 610.19.

Example 57

0393<chemistry id="CHEM-US-00147" num="00147"><img file="US8629430B2_D0146.tif" /></chemistry>

0394Compound 57 was synthesized in the same manner as in Example 55, except that intermediate (H) was used instead of intermediate (F). As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 610 relative to the molecular weight of 610.19.

Example 58

0395<chemistry id="CHEM-US-00148" num="00148"><img file="US8629430B2_D0147.tif" /></chemistry>

0396Compound 58 was synthesized in the same manner as in Example 55, except that 5-(3-bromophenyl)benzo[b]naphtho[2,1-d]furan was used instead of intermediate (F). As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 762 relative to the molecular weight of 762.26.

Example 59

0397<chemistry id="CHEM-US-00149" num="00149"><img file="US8629430B2_D0148.tif" /></chemistry>

0398Compound 59 was syntheiszed in the same manner as in Example 55, except that 10-(3-bromophenyl)benzo[b]naphtho[1,2-d]furan was used instead of intermediate (F). As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 762 relative to the molecular weight of 762.26.

Example 60

0399<chemistry id="CHEM-US-00150" num="00150"><img file="US8629430B2_D0149.tif" /></chemistry>

0400Compound 60 was synthesized in the same manner as in Example 55 according to the above-mentioned scheme. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 762 relative to the molecular weight of 762.26.

Example 61

0401<chemistry id="CHEM-US-00151" num="00151"><img file="US8629430B2_D0150.tif" /></chemistry>

0402In the atmosphere of argon, 4.08 g of 2-bromo-9,10-diphenylanthracene, 3.14 g of a boronic acid derivative of intermediate (H), 0.231 g of tetrakis(triphenylphosphine)palladium (0), 40 mL of 1,2-dimethoxyethane and 20 mL of a 2M aqueous sodium carbonate solution were placed in a flask. The resulting mixture was stirred under reflux for 8 hours. After cooling to room temperature, deposited solids were filtered. The resulting solids were washed with water and methanol, recrystallized from toluene, whereby 4.48 g of yellow solids of compound 61 was obtained. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 546 relative to the molecular weight of 546.20.

Example 62

0403<chemistry id="CHEM-US-00152" num="00152"><img file="US8629430B2_D0151.tif" /></chemistry>

0404Compound 62 was synthesized in the same manner as in Example 61 according to the above-mentioned scheme. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 646 relative to the molecular weight of 646.23.

Example 63

0405<chemistry id="CHEM-US-00153" num="00153"><img file="US8629430B2_D0152.tif" /></chemistry>

0406Compound 63 was obtained in the same manner as in Example 61 according to the above-mentioned scheme. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 778 relative to the molecular weight of 778.32.

Example 64

0407<chemistry id="CHEM-US-00154" num="00154"><img file="US8629430B2_D0153.tif" /></chemistry>

0408Compound 64 was obtained in the same manner as in Example 61 according to the above-mentioned scheme. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 646 relative to the molecular weight of 646.23.

Example 65

0409<chemistry id="CHEM-US-00155" num="00155"><img file="US8629430B2_D0154.tif" /></chemistry>

0410Compound 65 was obtained in the same manner as in Example 61 according to the above-mentioned scheme. As a result of mass spectroscopy, it was confirmed that this compound was an intended product having an m/e of 622 relative to the molecular weight of 622.21.

Examples 66 to 119

0411A glass substrate (GEOMATEC CO., LTD.) of 25 mm×75 mm×1.1 mm with an ITO transparent electrode (anode) was subjected to ultrasonic cleaning with isopropyl alcohol for 5 minutes, and cleaned with ultraviolet rays and ozone for 30 minutes. The resultant glass substrate with transparent electrode lines was mounted on a substrate holder in a vacuum vapor deposition apparatus. First, compound A-1 was formed into a film in a thickness of 60 nm on the surface of the transparent electrode on which the transparent electrode lines were formed so as to cover the transparent electrode. Subsequent to the formation of the A-1 film, compound A-2 was formed thereon into a film in a film thickness of 20 nm.

0412Further, on this A-2 film, compounds 1 to 54 produced in Examples 1 to 54 and the following dopants D-1 and D-2 were formed in a film thickness of 40 nm in a thickness ratio of 40:2. The resulting films were served as blue-emitting layers in Examples 66 to 113 and green-emitting layers in Examples 114 to 119. The anthracene derivatives and the dopants used in each example were shown in Tables 1 to

0413On this film, as an electron-transporting layer, ET-1 having the following structure was formed into a 20 nm-thick film by deposition. Thereafter, LiF was formed into a 1 nm-thick film. Metal Al was deposited in a thickness of 150 nm as a metal cathode, thereby fabricating an organic EL device.

0414The organic EL device thus obtained was allowed to emit light by DC current of 10 mA/m²and the luminous efficiency was measured. In addition, the half life at the initial luminance of 1000 cd/cm²was measured by conducting a DC continuous current test. The results are shown in Tables 1 to 3.

0415<chemistry id="CHEM-US-00156" num="00156"><img file="US8629430B2_D0155.tif" /></chemistry>

Examples 120 to 131

0416A glass substrate (GEOMATEC CO., LTD.) of 25 mm×75 mm×1.1 mm with an ITO transparent electrode (anode) was subjected to ultrasonic cleaning with isopropyl alcohol for 5 minutes, and cleaned with ultraviolet rays and ozone for 30 minutes. The resultant glass substrate with transparent electrode lines was mounted on a substrate holder in a vacuum vapor deposition apparatus. First, compound A-1 was formed into a film in a thickness of 65 nm on the surface of the transparent electrode on which the transparent electrode lines were formed so as to cover the transparent electrode. Subsequent to the formation of the A-1 film, compound A-2 was formed thereon into a film in a thickness of 65 nm.

0417Further, on this A-2 film, compounds 52, and 61 to 65 of the invention and D-2 and D-3 were formed in a film thickness of 30 nm in a thickness ratio of 28.5:1.5. The resulting films were served as a green emitting layer. The anthracene derivatives and the dopants used in each example were shown in Table 4.

0418On this film, as an electron-transporting layer, ET-2 having the following structure was formed into a 20 nm-thick film by deposition. Thereafter, LiF was formed into a 1 nm-thick film. Metal Al was deposited in a thickness of 150 nm as a metal cathode, thereby fabricating an organic EL device.

0419The organic EL devices thus obtained were evaluated in the same manner as in Examples 66 to 119.

0420<chemistry id="CHEM-US-00157" num="00157"><img file="US8629430B2_D0156.tif" /></chemistry>

Comparative Examples 1 to 4

0421Organic EL devices were fabricated and evaluated in the same manner as in Example 66, except that the compounds (A) to (D) with the following structures were used instead of compound 1. The anthracene derivatives and the dopants used in each example were shown in Tables 1 to 3. The results are shown in Tables 1 to 3.

0422<chemistry id="CHEM-US-00158" num="00158"><img file="US8629430B2_D0157.tif" /></chemistry>

Comparative Example 5

0423Organic EL devices were fabricated and evaluated in the same manner as in Example 66, except that compound (E) with the following structure was used instead of compound 1 and D-2 was used instead of D-1. The results are shown in Table 3.

0424<chemistry id="CHEM-US-00159" num="00159"><img file="US8629430B2_D0158.tif" /></chemistry>

Comparative Example 6

0425An organic EL device was fabricated and evaluated in the same manner as in Example 120, except that compound (E) with the above structure was used instead of compound 52. The results are shown in Table 4.

Comparative Example 7

0426An organic EL device was fabricated and evaluated in the same manner as in Comparative Example 6, except that D-3 was used instead of D-2. The results are shown in Table 4.

0427<tables id="TABLE-US-00001" num="00001"><table frame="none" colsep="0" rowsep="0"><tgroup align="left" colsep="0" rowsep="0" cols="6"><colspec colname="1" colwidth="42pt" align="center" /><colspec colname="2" colwidth="49pt" align="left" /><colspec colname="3" colwidth="28pt" align="center" /><colspec colname="4" colwidth="35pt" align="center" /><colspec colname="5" colwidth="28pt" align="center" /><colspec colname="6" colwidth="35pt" align="center" /><thead><row><entry namest="1" nameend="6" rowsep="1">TABLE 1</entry></row><row><entry namest="1" nameend="6" align="center" rowsep="1" /></row><row><entry /><entry /><entry /><entry>Luminous</entry><entry /><entry /></row><row><entry /><entry /><entry /><entry>efficiency</entry><entry>Life-</entry><entry>Emission</entry></row><row><entry>Example No.</entry><entry>Host</entry><entry>Dopant</entry><entry>(cd/A)</entry><entry>time (h)</entry><entry>color</entry></row><row><entry namest="1" nameend="6" align="center" rowsep="1" /></row></thead><tbody valign="top"><row><entry>66</entry><entry>Compound 1</entry><entry>D-1</entry><entry>7.1</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>67</entry><entry>Compound 2</entry><entry>D-1</entry><entry>7.3</entry><entry>8000</entry><entry>Blue</entry></row><row><entry>68</entry><entry>Compound 3</entry><entry>D-1</entry><entry>7.1</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>69</entry><entry>Compound 4</entry><entry>D-1</entry><entry>7.1</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>70</entry><entry>Compound 5</entry><entry>D-1</entry><entry>6.9</entry><entry>9500</entry><entry>Blue</entry></row><row><entry>71</entry><entry>Compound 6</entry><entry>D-1</entry><entry>7.0</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>72</entry><entry>Compound 7</entry><entry>D-1</entry><entry>6.9</entry><entry>9500</entry><entry>Blue</entry></row><row><entry>73</entry><entry>Compound 8</entry><entry>D-1</entry><entry>6.9</entry><entry>9500</entry><entry>Blue</entry></row><row><entry>74</entry><entry>Compound 9</entry><entry>D-1</entry><entry>7.4</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>75</entry><entry>Compound 10</entry><entry>D-1</entry><entry>7.5</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>76</entry><entry>Compound 11</entry><entry>D-1</entry><entry>7.4</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>77</entry><entry>Compound 12</entry><entry>D-1</entry><entry>7.4</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>78</entry><entry>Compound 13</entry><entry>D-1</entry><entry>7.4</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>79</entry><entry>Compound 14</entry><entry>D-1</entry><entry>7.5</entry><entry>8000</entry><entry>Blue</entry></row><row><entry>80</entry><entry>Compound 15</entry><entry>D-1</entry><entry>7.4</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>81</entry><entry>Compound 16</entry><entry>D-1</entry><entry>7.4</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>82</entry><entry>Compound 17</entry><entry>D-1</entry><entry>7.0</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>83</entry><entry>Compound 18</entry><entry>D-1</entry><entry>7.1</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>84</entry><entry>Compound 19</entry><entry>D-1</entry><entry>7.0</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>85</entry><entry>Compound 20</entry><entry>D-1</entry><entry>7.0</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>86</entry><entry>Compound 21</entry><entry>D-1</entry><entry>7.2</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>87</entry><entry>Compound 22</entry><entry>D-1</entry><entry>7.5</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>88</entry><entry>Compound 23</entry><entry>D-1</entry><entry>7.3</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>89</entry><entry>Compound 24</entry><entry>D-1</entry><entry>7.2</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>90</entry><entry>Compound 25</entry><entry>D-1</entry><entry>7.2</entry><entry>9000</entry><entry>Blue</entry></row><row><entry namest="1" nameend="6" align="center" rowsep="1" /></row></tbody></tgroup></table></tables>

0428<tables id="TABLE-US-00002" num="00002"><table frame="none" colsep="0" rowsep="0"><tgroup align="left" colsep="0" rowsep="0" cols="6"><colspec colname="1" colwidth="42pt" align="center" /><colspec colname="2" colwidth="49pt" align="left" /><colspec colname="3" colwidth="28pt" align="center" /><colspec colname="4" colwidth="35pt" align="center" /><colspec colname="5" colwidth="28pt" align="center" /><colspec colname="6" colwidth="35pt" align="center" /><thead><row><entry namest="1" nameend="6" rowsep="1">TABLE 2</entry></row><row><entry namest="1" nameend="6" align="center" rowsep="1" /></row><row><entry /><entry /><entry /><entry>Luminous</entry><entry /><entry /></row><row><entry /><entry /><entry /><entry>efficiency</entry><entry>Life-</entry><entry>Emission</entry></row><row><entry>Example No.</entry><entry>Host</entry><entry>Dopant</entry><entry>(cd/A)</entry><entry>time (h)</entry><entry>color</entry></row><row><entry namest="1" nameend="6" align="center" rowsep="1" /></row></thead><tbody valign="top"><row><entry /></row></tbody></tgroup><tgroup align="left" colsep="0" rowsep="0" cols="6"><colspec colname="1" colwidth="42pt" align="char" char="." /><colspec colname="2" colwidth="49pt" align="left" /><colspec colname="3" colwidth="28pt" align="center" /><colspec colname="4" colwidth="35pt" align="center" /><colspec colname="5" colwidth="28pt" align="char" char="." /><colspec colname="6" colwidth="35pt" align="center" /><tbody valign="top"><row><entry>91</entry><entry>Compound 26</entry><entry>D-1</entry><entry>7.4</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>92</entry><entry>Compound 27</entry><entry>D-1</entry><entry>7.5</entry><entry>8000</entry><entry>Blue</entry></row><row><entry>93</entry><entry>Compound 28</entry><entry>D-1</entry><entry>7.5</entry><entry>8000</entry><entry>Blue</entry></row><row><entry>94</entry><entry>Compound 29</entry><entry>D-1</entry><entry>7.0</entry><entry>9500</entry><entry>Blue</entry></row><row><entry>95</entry><entry>Compound 30</entry><entry>D-1</entry><entry>7.2</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>96</entry><entry>Compound 31</entry><entry>D-1</entry><entry>7.1</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>97</entry><entry>Compound 32</entry><entry>D-1</entry><entry>7.1</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>98</entry><entry>Compound 33</entry><entry>D-1</entry><entry>7.2</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>99</entry><entry>Compound 34</entry><entry>D-1</entry><entry>7.4</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>100</entry><entry>Compound 35</entry><entry>D-1</entry><entry>7.4</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>101</entry><entry>Compound 36</entry><entry>D-1</entry><entry>7.4</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>102</entry><entry>Compound 37</entry><entry>D-1</entry><entry>7.0</entry><entry>8000</entry><entry>Blue</entry></row><row><entry>103</entry><entry>Compound 38</entry><entry>D-1</entry><entry>7.2</entry><entry>8000</entry><entry>Blue</entry></row><row><entry>104</entry><entry>Compound 39</entry><entry>D-1</entry><entry>7.1</entry><entry>8000</entry><entry>Blue</entry></row><row><entry>105</entry><entry>Compound 40</entry><entry>D-1</entry><entry>7.1</entry><entry>8000</entry><entry>Blue</entry></row><row><entry>106</entry><entry>Compound 41</entry><entry>D-1</entry><entry>7.2</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>107</entry><entry>Compound 42</entry><entry>D-1</entry><entry>7.4</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>108</entry><entry>Compound 43</entry><entry>D-1</entry><entry>7.3</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>109</entry><entry>Compound 44</entry><entry>D-1</entry><entry>7.3</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>110</entry><entry>Compound 45</entry><entry>D-1</entry><entry>7.2</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>111</entry><entry>Compound 46</entry><entry>D-1</entry><entry>7.4</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>112</entry><entry>Compound 47</entry><entry>D-1</entry><entry>7.3</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>113</entry><entry>Compound 48</entry><entry>D-1</entry><entry>7.3</entry><entry>9000</entry><entry>Blue</entry></row><row><entry>Com. Ex. 1</entry><entry>Compound (A)</entry><entry>D-1</entry><entry>6.6</entry><entry>3000</entry><entry>Blue</entry></row><row><entry>Com. Ex. 2</entry><entry>Compound (B)</entry><entry>D-1</entry><entry>6.6</entry><entry>3000</entry><entry>Blue</entry></row><row><entry>Com. Ex. 3</entry><entry>Compound (C)</entry><entry>D-1</entry><entry>6.8</entry><entry>5000</entry><entry>Blue</entry></row><row><entry>Com. Ex. 4</entry><entry>Compound (D)</entry><entry>D-1</entry><entry>4.0</entry><entry>100</entry><entry>Blue</entry></row><row><entry namest="1" nameend="6" align="center" rowsep="1" /></row></tbody></tgroup></table></tables>

0429<tables id="TABLE-US-00003" num="00003"><table frame="none" colsep="0" rowsep="0"><tgroup align="left" colsep="0" rowsep="0" cols="6"><colspec colname="1" colwidth="42pt" align="center" /><colspec colname="2" colwidth="49pt" align="left" /><colspec colname="3" colwidth="28pt" align="center" /><colspec colname="4" colwidth="35pt" align="center" /><colspec colname="5" colwidth="28pt" align="center" /><colspec colname="6" colwidth="35pt" align="center" /><thead><row><entry namest="1" nameend="6" rowsep="1">TABLE 3</entry></row><row><entry namest="1" nameend="6" align="center" rowsep="1" /></row><row><entry /><entry /><entry /><entry>Luminous</entry><entry /><entry /></row><row><entry /><entry /><entry /><entry>efficiency</entry><entry>Life-</entry><entry>Emission</entry></row><row><entry>Example No.</entry><entry>Host</entry><entry>Dopant</entry><entry>(cd/A)</entry><entry>time (h)</entry><entry>color</entry></row><row><entry namest="1" nameend="6" align="center" rowsep="1" /></row></thead><tbody valign="top"><row><entry>114</entry><entry>Compound 49</entry><entry>D-2</entry><entry>25</entry><entry>40000</entry><entry>Green</entry></row><row><entry>115</entry><entry>Compound 50</entry><entry>D-2</entry><entry>25</entry><entry>40000</entry><entry>Green</entry></row><row><entry>116</entry><entry>Compound 51</entry><entry>D-2</entry><entry>25</entry><entry>40000</entry><entry>Green</entry></row><row><entry>117</entry><entry>Compound 52</entry><entry>D-2</entry><entry>26</entry><entry>40000</entry><entry>Green</entry></row><row><entry>118</entry><entry>Compound 53</entry><entry>D-2</entry><entry>26</entry><entry>40000</entry><entry>Green</entry></row><row><entry>119</entry><entry>Compound 54</entry><entry>D-2</entry><entry>26</entry><entry>40000</entry><entry>Green</entry></row><row><entry>Com. Ex. 5</entry><entry>Compound (E)</entry><entry>D-2</entry><entry>22</entry><entry>25000</entry><entry>Green</entry></row><row><entry namest="1" nameend="6" align="center" rowsep="1" /></row></tbody></tgroup></table></tables>

0430<tables id="TABLE-US-00004" num="00004"><table frame="none" colsep="0" rowsep="0"><tgroup align="left" colsep="0" rowsep="0" cols="6"><colspec colname="1" colwidth="42pt" align="center" /><colspec colname="2" colwidth="49pt" align="left" /><colspec colname="3" colwidth="28pt" align="center" /><colspec colname="4" colwidth="35pt" align="center" /><colspec colname="5" colwidth="28pt" align="center" /><colspec colname="6" colwidth="35pt" align="center" /><thead><row><entry namest="1" nameend="6" rowsep="1">TABLE 4</entry></row><row><entry namest="1" nameend="6" align="center" rowsep="1" /></row><row><entry /><entry /><entry /><entry>Luminous</entry><entry /><entry /></row><row><entry /><entry /><entry /><entry>efficiency</entry><entry>Life-</entry><entry>Emission</entry></row><row><entry>Example No.</entry><entry>Host</entry><entry>Dopant</entry><entry>(cd/A)</entry><entry>time (h)</entry><entry>color</entry></row><row><entry namest="1" nameend="6" align="center" rowsep="1" /></row></thead><tbody valign="top"><row><entry /></row></tbody></tgroup><tgroup align="left" colsep="0" rowsep="0" cols="6"><colspec colname="1" colwidth="42pt" align="center" /><colspec colname="2" colwidth="49pt" align="left" /><colspec colname="3" colwidth="28pt" align="center" /><colspec colname="4" colwidth="35pt" align="center" /><colspec colname="5" colwidth="28pt" align="char" char="." /><colspec colname="6" colwidth="35pt" align="center" /><tbody valign="top"><row><entry>120</entry><entry>Compound 52</entry><entry>D-2</entry><entry>42</entry><entry>10000</entry><entry>Green</entry></row><row><entry>121</entry><entry>Compound 61</entry><entry>D-2</entry><entry>42</entry><entry>80000</entry><entry>Green</entry></row><row><entry>122</entry><entry>Compound 62</entry><entry>D-2</entry><entry>43</entry><entry>100000</entry><entry>Green</entry></row><row><entry>123</entry><entry>Compound 63</entry><entry>D-2</entry><entry>42</entry><entry>90000</entry><entry>Green</entry></row><row><entry>124</entry><entry>Compound 64</entry><entry>D-2</entry><entry>43</entry><entry>100000</entry><entry>Green</entry></row><row><entry>125</entry><entry>Compound 65</entry><entry>D-2</entry><entry>40</entry><entry>60000</entry><entry>Green</entry></row><row><entry>126</entry><entry>Compound 52</entry><entry>D-3</entry><entry>44</entry><entry>50000</entry><entry>Green</entry></row><row><entry>127</entry><entry>Compound 61</entry><entry>D-3</entry><entry>44</entry><entry>40000</entry><entry>Green</entry></row><row><entry>128</entry><entry>Compound 62</entry><entry>D-3</entry><entry>45</entry><entry>50000</entry><entry>Green</entry></row><row><entry>129</entry><entry>Compound 63</entry><entry>D-3</entry><entry>44</entry><entry>45000</entry><entry>Green</entry></row><row><entry>130</entry><entry>Compound 64</entry><entry>D-3</entry><entry>44</entry><entry>50000</entry><entry>Green</entry></row><row><entry>131</entry><entry>Compound 65</entry><entry>D-3</entry><entry>41</entry><entry>30000</entry><entry>Green</entry></row><row><entry>Com. Ex. 6</entry><entry>Compound (E)</entry><entry>D-2</entry><entry>36</entry><entry>30000</entry><entry>Green</entry></row><row><entry>Com. Ex. 7</entry><entry>Compound (E)</entry><entry>D-3</entry><entry>38</entry><entry>10000</entry><entry>Green</entry></row><row><entry namest="1" nameend="6" align="center" rowsep="1" /></row></tbody></tgroup></table></tables>

0431From the above, it can be understood that the luminous efficiency can be improved and the lifetime can be prolonged by using the compound of the invention. By comparing the compounds (A) to (D) used in Comparative Examples 1 to 4, it can be confirmed that an organic EL device using an anthracene derivative having a fused dibenzofuran substituent represented by Z in Examples has a longer life and a high efficiency as compared with an organic EL device using an athracene derivative having a dibenzofuran substituent.

0432Further, the derivative having a trisubstituted anthracene derivative having a fused dibenzofuran substituent represented by Z in Examples is suitable as the host material of a green organic EL device. In the green organic EL device, an organic EL device using an anthracene derivative having a fused dibenzofuran substituent or a fused dibenzothiophene substituent represented by Z (Examples 114 to 131) has a longer life and a high efficiency as compared with an organic EL device using an athracene derivative having a dibenzofuran substituent (Comparative Examples 5 to 7). The reason therefor is assumed to be that, by allowing dibenzofuran or dibenzothiophene to have a fused ring structure, electric charges are more localized, whereby stability to holes and electrons is improved.

INDUSTRIAL APPLICABILITY

0433The anthracene derivative of the invention is preferably used in an organic EL device. Further, the organic EL device of the invention is useful as a planar emitting body such as a flat panel display of a wall-hanging television or light sources such as backlight of a display or the like.

0434Although only some exemplary embodiments and/or examples of this invention have been described in detail above, those skilled in the art will readily appreciate that many modifications are possible in the exemplary embodiments and/or examples without materially departing from the novel teachings and advantages of this invention. Accordingly, all such modifications are intended to be included within the scope of this invention.

0435The documents described in the specification are incorporated herein by reference in its entirety.